CompGenies
Real eBay sold comps · Live auctions & collectionsKnow what every card isactually worth — live or in your vault.
CompGenies pulls real eBay sold prices for whatever is on your screen — median, recent sales, and the full range — while the auction runs. Then tracks your whole collection, photo to portfolio, with live market value and P&L.
Two ways to stop guessing prices
Pick the tool that fits what you're doing right now. Both use the same real eBay sold comps.
Chrome extensionLive auction comps
Reads the card on your Whatnot, eBay Live, or TikTok Live stream and shows the median sold price, recent sales, and full range before the hammer drops.
- Comps in under a second
- Auto-detects the next lot
- Sports cards, TCG, and everything else
Collection trackerTrack your card collection
Upload photos of your cards. CompGenies names each one, prices it from sold comps, and tracks your portfolio value and P&L with live graphs.
- Snap a photo, get the card
- Value graphs over time
- Buy price vs. sale price P&L
Free trial included — no card needed
A live auction gives you 20 seconds to decide.
The seller holds the item up, the chat starts hyping, and the price climbs $5 at a time. By the time you've opened a new tab, typed the title into eBay, and switched the filter to Sold Items, the lot is gone — or you've paid 40% over what it's worth.
That's the whole problem. Not a lack of data — eBay has decades of it. A lack of time.
20s
Typical time a lot stays open
3 taps
To search sold comps by hand — if you're fast
40%
Overpay it takes one hyped chat to create
0
Comps most buyers actually check mid-stream
Everything you need to bid with a number in your head
CompGenies does one job and does it fast: turn the item on screen into real sold data.
Comps in under a second
Hit scan and the median sold price, range, and latest sales land on screen before the bidding heats up.
Any category, not just cards
Watches, sneakers, comics, toys, tools, vintage clothing — if it sold on eBay, CompGenies finds it.
Auto-detect new items
Pro watches the stream for the next lot and pulls fresh comps the moment the item changes.
Know your walk-away number
A hard price range keeps you from chasing a $180 item to $260 because the chat got loud.
Scan history
Every lot you scanned, saved with the comp data — review what you won and what you dodged.
Stays out of the way
A small draggable panel you can collapse. No autoplay noise, no bidding on your behalf, ever.
Real screens, real sports card comps
The live overlay, your portfolio dashboard and the per-card comps report — pulled straight from eBay sold listings.
Live overlay on the stream
Median sold, low→high range and recent sales for the card on screen.
Portfolio dashboard
Market value over time, cost basis, realized and unrealized P&L, biggest movers.
Card comps report
Median comp, spread, sale count and P&L for every card, with the eBay sold link.
Detected item
2018 Panini Prizm Luka Doncic #280 RC · PSA 10
Median sold
$812
Range
$725 – $950
- $812.00Best offer acceptedAug 24
- $795.00AuctionAug 22
The overlay, on the stream, where you're already looking
Median sold price
The single number that tells you whether the current bid is a deal.
Recent sales with dates
Because a comp from 2021 is not a comp. Freshness is shown per sale.
Full eBay sold search, one click
Want to dig in? Open the exact filtered search in a new tab.
Track your collection like a portfolio
Upload cards from your phone or desktop. CompGenies names each card, prices it from sold comps, and keeps a running P&L so you always know what your collection is worth.
Snap a photo, get the card
The same vision engine that reads live streams identifies player, year, set, number, parallel, and grade from a single photo.
Real-time market value
Every card is priced against fresh eBay sold comps — median, low, high, and how many sales back it up.
Portfolio dashboard
See total cost basis, current market value, realized profit, and your top cards at a glance.
Track buys and sales
Log purchase price, sale price, and dates so you know exactly what you made — and what you're holding.
247
Cards held
$8,420
Cost basis
$12,180
Market value
$1,340
Realized profit
Portfolio value over time
What buyers say
Placeholder reviews — swap in real testimonials at launch.
"I used to screenshot items and search eBay on my phone while the lot was closing. Now the number is just there."
"Auto mode is the whole product for me. Comps refresh as the seller moves to the next lot and I never lose the stream."
"Paid for itself the first night. I passed on two lots that were going way over comps."
Simple pricing
Start with a free trial of everything. Go Pro when you're bidding often enough that unlimited and auto-detect pay for themselves in one lot.
Free
Try everything free, then keep a daily check on the item that matters.
Free forever, no card required
- Free trial with every Pro feature
- 1 scan per day after the trial
- Manual Scan Item button
- Median sold price + price range
- 3 most recent sales
- Whatnot, eBay Live & TikTok Live
- Auto-detect mode
- Scan history
- Priority support
Pro
For people bidding every night, not every month.
Billed monthly, cancel anytime
- Unlimited scans
- Auto-detect mode — comps appear on their own
- Full recent sales feed with dates
- Scan history across sessions
- Sold-through rate & price trend
- Priority support
Your next lot is 20 seconds long.
Install CompGenies and walk into it knowing what the item is worth.