A Chrome extension that helps collectors check prices while browsing eBay listings. Supports sports cards, trading card games (TCGs), comic books, Funko Pops, and other collectibles.
Detected Item & Price Lookup
Price Comparison by Grade
Multiple Match Selection
- Automatic detection - Extracts name, year, set/series, number, and grade from eBay Item Specifics
- Real-time pricing - Fetches current market prices from SportsCardsPro and PriceCharting
- Smart routing - Sports cards go to SportsCardsPro; TCGs, comics, and non-sport items go to PriceCharting
- Grade matching - Highlights the price for your item's specific grade
- Multi-grader support - Works with PSA, BGS, SGC, CGC, CBCS, PGX, and more
Sports Cards
- Baseball, football, basketball, hockey, soccer, golf, tennis, boxing, wrestling, racing, MMA
Trading Card Games (TCGs)
- Pokémon, Magic: The Gathering, Yu-Gi-Oh!, Digimon, One Piece TCG, Disney Lorcana, Weiss Schwarz
Non-Sport Trading Cards
- Star Wars, Marvel, Garbage Pail Kids, and more
Comic Books
- CGC, CBCS, and PGX graded comics
- All major publishers (Marvel, DC, Image, Dark Horse, IDW, and more)
- Silver Age through Modern Age
Funko Pops
- All Funko Pop! Vinyl figures
- Supports variants (Chase, Metallic, Flocked, GITD, etc.)
- Graded Funko Pops (PSA, VVGS)
Not Yet Supported
- Video games and consoles
- LEGO sets
- Amiibo and other collectibles
- Download the latest
pricechecking-vX.X.X.zipfrom Releases - Unzip the file
- Open Chrome and go to
chrome://extensions/ - Enable "Developer mode" (top right)
- Click "Load unpacked" and select the unzipped folder
(Coming soon)
- Clone this repository
- Open Chrome and go to
chrome://extensions/ - Enable "Developer mode" (top right)
- Click "Load unpacked" and select the repository folder
- Navigate to any eBay listing (cards, comics, or collectibles)
- Click the PriceChecking icon in your toolbar
- View detected item info and click the search button
- Browse prices across all grades
The extension:
- Reads eBay's Item Specifics to extract metadata (with title parsing as fallback)
- Determines the item type (sports card, TCG, comic, Funko Pop, or non-sport)
- Routes to the appropriate pricing database:
- Sports cards → SportsCardsPro
- TCGs, comics, Funko Pops, and non-sport items → PriceCharting
- Displays current market prices by grade
- Highlights the matching grade for easy comparison
Item not detected correctly? Use the "Report it" link to submit feedback.
- No personal data is collected or stored
- No accounts required
- Item data is only sent to SportsCardsPro or PriceCharting for price lookups
Run the test suite:
node tests/run-tests.jsPrice data provided by SportsCardsPro.com / PriceCharting.com
MIT