01
Manual comps are slow
A beginner has to open sold listings, compare condition, check dates, and guess which comps actually match. My Deal Verifier brings that context into the listing you are already viewing.
eBay, Mercari & Buyee Deal Checker for Resellers
Verify every deal. Be first to every drop.
My Deal HQ helps resellers verify marketplace listings with sold comps, profit math, ROI, and real-time deal alerts directly inside eBay, Mercari, and Buyee.
No signup, no card
Works in 60 seconds
30-day refund
Works on the marketplaces you already use
eBay
Mercari US
Buyee.jp (Mercari Japan)
JDirectItems Auction (via Buyee)
JDirectItems Fleamarket (via Buyee)
eBay
Mercari US
Buyee.jp (Mercari Japan)
JDirectItems Auction (via Buyee)
JDirectItems Fleamarket (via Buyee)
Deal checking
Check marketplace deals before you buy.
My Deal Verifier compares live marketplace listings against recent eBay sold comps so resellers can quickly see whether an item is underpriced, fairly priced, or overpriced.
Use the eBay sold comps Chrome extension on eBay, Mercari US, and Buyee Japan to check buyer value, reseller profit, ROI, shipping risk, and landed cost before you make a purchase. Instead of opening sold listings in another tab, the extension scores the page you are already browsing and shows the pricing context next to the listing.
On eBay, My Deal Verifier acts as an eBay deal checker and reseller profit calculator. It compares the current asking price to recent sold-comp data, estimates net profit after fees and shipping, and marks listings as a good buy, borderline, fair, high, or overpriced. That gives daily flippers a fast way to spot underpriced items without turning every sourcing session into manual spreadsheet work.
On Mercari, the extension helps resellers judge whether a listing is worth buying for resale or only fair as a personal purchase. The same deal scoring logic keeps your workflow consistent across marketplaces, so you can scan fast and still audit the comps behind each verdict.
On Buyee Japan, My Deal Verifier adds landed-cost math for proxy buying. It factors in item price, Buyee fees, Japan domestic shipping, international forwarding, and tariff assumptions so the yen sticker price does not trick you into overpaying. When a matching Buyee source appears for an eBay listing, the extension can surface the cheaper Japan option before you buy from the markup listing.
Deal Watch adds the other half of the workflow: saved-search monitoring. Watch an eBay or Buyee search once, and My Deal HQ keeps checking for new listings so you can act before other buyers find the deal.
The point is not to replace reseller judgment. It is to move the repetitive math into the browser so you can spend more time judging condition, model variants, seller quality, shipping constraints, and sell-through risk. For watch flippers, card sellers, video game resellers, camera buyers, and Japan import hunters, that means fewer missed deals and fewer buys that looked cheap until fees and shipping erased the margin.
eBay deal checker
Scan active eBay listings against sold comps, price history, reseller profit, and ROI before you open every result.
Mercari deal checker
Apply the same marketplace verdicts to Mercari US listings so good personal buys and good resale buys stay separate.
Buyee landed-cost checker
Estimate the real Japan import price before proxy fees, forwarding, and tariffs turn a cheap yen listing into a bad flip.
Why use it
Why use My Deal Verifier before you buy?
Manual sourcing works when you have time. The problem is that good listings move faster than manual comp checks, fee math, and Japan landed-cost estimates.
02
Cheap is not always profitable
A low asking price can still be a bad reseller buy after marketplace fees, shipping, weak sell-through, or condition mismatch. The extension turns sold comps into profit and ROI context before you click buy.
03
Buyee needs landed-cost math
Japan listings can look underpriced until proxy fees, domestic shipping, forwarding, and international shipping hit the total. My Deal Verifier helps compare the real landed price against eBay market value.
04
Good deals disappear fast
If you are manually refreshing searches, you are competing with everyone else doing the same thing. Deal Watch monitors saved searches and alerts you when new listings appear, so you can inspect the deal first.
The extension does the repetitive math in the browser so you can focus on the judgment call: model variant, condition, seller quality, shipping risk, demand, and whether the item will actually sell. That is where a reseller's edge lives.
The toolkit
Four scanners. One license. Zero subscriptions per tool.
Each extension does one job better than anyone else. Together they cover every angle of buying and reselling online.
Deal Watch — live now
🔔 Buy it before anyone else sees it.
A reseller posts a G-Shock for $80 under market. You have maybe 20 minutes before it's gone. Deal Watch scans your saved searches every 15 minutes and pushes the listing straight to your phone the moment it goes live — while everyone else is still scrolling.
- ⚡ New post = instant alertThe second a fresh listing hits your search, you get a push notification with the title, price, and a direct tap-to-open link.
- 📱 Works on your phoneEnable alerts at mydealhq.com/dashboard and notifications hit your phone even when Chrome isn't open.
- 🌐 Runs 24/7 on our serversOur servers do the watching — not your browser. Shut your laptop, turn off your PC. Deals still find you.
- 👁 Watch anything in one clickRun any eBay or Buyee search, click Watch in the extension bar. That's it. Manage all watches from the popup.
Live notification example
mydealhq.com · just now
🔔 New listing — g-shock GW-9400
$258 · Casio G-SHOCK GW-9400J-1JF Solar Rangeman...
Tap to open listing
Tap to open listing
mydealhq.com · 15 min ago
🔔 4 new listings — "seiko skx"
From $89 · Tap to see all new results
Checks every 15 min · runs 24/7 📱 works on mobile
Built right
Unified by design.
Unified by design.
One license. Every extension.
Buy a license once. Paste it into any extension in the toolkit and the same key unlocks Pro or Power features in all four — including the new ones we ship next.
1
Live today
3
Coming soon
1
License unlocks all
99
Tests passing
How it works
Three steps. Zero learning curve.
01
Install in one click
One Chrome Web Store install. No account, no setup wizard. Free tier works the second it lands.
02
Browse like normal
Open eBay or Buyee — the extension scores every listing automatically. Color-coded verdict on every tile.
03
Trust the verdict
Filter the page to show only deals. Click any badge to see the exact comps behind the score.
04
Set a watch, be first
Click 👁 Watch on any search. Our servers check it every 15 minutes — the moment a new listing posts, it hits your phone before anyone else sees it.
Why different
Built for resellers, not VC slide decks.
No account required
Free tier works without signing up. Forever.
Nothing sold or tracked
Runs in your browser. We never see what you buy.
Open scoring math
Click any verdict to see exactly how it was calculated.
Built by a working reseller
Made for daily flippers, not pitch decks.
Pricing
One simple price for the whole toolkit.
Free works the day you install. Pro and Power unlock the same features in every extension.
Best value
Product Pro
$8.99 /month
Choose either My Deal Verifier Pro or Cross-List Pro. Pro does not unlock both.
Start ProPower
$14.99 /month
Includes both released products. Coming-soon tools unlock when they ship.
Get PowerLifetime — first 100 seats only
Pay once, own forever. Lifetime Pro $129 per product · Lifetime Power $249
Questions
Frequently asked.
Do I need an account to use the trial?
You can install and try the released extensions for 7 days. After the trial, sign in and choose Verifier Pro, Cross-List Pro, or Power to keep paid features active.
What happens after my 7-day trial ends?
Paid features require a license. Verifier Pro is $8.99/mo for My Deal Verifier only, Cross-List Pro is $8.99/mo for Cross-List only, and Power is $14.99/mo for both released products.
How is My Deal Verifier different from camelcamelcamel or Honey?
Camel and Honey track Amazon prices. My Deal Verifier scores eBay listings against eBay’s own market data — including auctions, used items, and Buyee Mercari Japan tiles — and gives you reseller profitability math, not just “it’s on sale.”
Will the extensions slow down my browsing?
No. Everything runs lazily as you scroll. Core scanning is batched and uses an IntersectionObserver so the main thread stays free even on 60+ result pages.
Is my browsing data sold or shared?
No. The extensions run locally in your browser. The only thing that ever leaves your device is anonymous price queries to a backend proxy that talks to eBay’s public Browse API. No tracking, no analytics inside the extensions.
What if I buy Lifetime and you add new features later?
Lifetime Pro is product-specific: either My Deal Verifier or Cross-List. Lifetime Power includes both released products and coming-soon tools when they are built and shipped.
Why pay for a deal checker when Honey is free?
Honey checks Amazon coupon codes. My Deal Verifier scores eBay listings against eBay’s own market data — including auctions, used items, and Buyee Mercari Japan tiles. It tells you if the listing is actually a good deal or overpriced, not just whether there’s a coupon. And Pro pays for itself the first time you skip a bad listing.
What is the best Chrome extension for eBay sold comps?
My Deal Verifier is built for resellers who want sold-comp checks, profit math, ROI, and deal verdicts directly on marketplace listing pages.
Does My Deal HQ work on Mercari and Buyee?
Yes. My Deal Verifier supports eBay, Mercari US, and Buyee Japan marketplace pages, including deal scoring and reseller-focused pricing context.
Can My Deal HQ help find underpriced items?
Yes. Deal Watch monitors saved searches and sends alerts when new listings appear, helping resellers act before other buyers find the deal.
Refund policy?
30-day no-questions-asked refund on monthly, annual, and lifetime plans. Email support@mydealhq.com.
Ready to stop overpaying?
Install the toolkit free in under a minute. Upgrade whenever you're ready.