Frequently Asked Questions

How do I search?

Type in a description of the collectible you’re pricing. The more specific your search, the more accurate the results will be. If you aren’t getting many listings, try broadening your search terms. For cards, a good baseline is the year, player name, and card manufacturer. Initially, we give you our best estimate of current market worth. To get a more specific price, use the checkboxes to select items most similar to yours to get the average price of your collectible!

What can I search for?

Just about anything that's sold on eBay. Mavin will tell you what it's worth based on recently sold comparable items. Below is a list of the categories we offer:

  • Antiques
  • Art
  • Baby
  • Books
  • Business & Industrial
  • Cameras & Photo
  • Cell Phones & Accessories
  • Clothing, Shoes & Accessories
  • Coins & Paper Money
  • Collectibles
  • Computers/Tablets & Networking
  • Consumer Electronics
  • Crafts
  • Dolls & Bears
  • DVDs & Movies
  • eBay Motors
  • Entertainment Memorabilia
  • Health & Beauty
  • Home & Garden
  • Jewelry & Watches
  • Music
  • Musical Instruments & Gear
  • Pet Supplies
  • Pottery & Glass
  • Real Estate
  • Specialty Services
  • Sporting Goods
  • Sports Mem, Cards & Fan Shop
  • Stamps
  • Tickets & Experiences
  • Toys & Hobbies
  • Travel
  • Video Games & Consoles
What data are you using to generate worth?

We’re currently utilizing real-time market data from eBay, but we’re working to improve our database of comparable by building the next generation of Mavin that will utilize data from multiple sources.

How do you determine worth?

When you search for a card on Mavin, we give you our best estimate of market worth. Our algorithm uses cards that have been sold in the past six months and then filters out the junk cards (reprints, lots, fakes, etc.). We determine the current market value of the card by matching the results together. This algorithm will change in the future as we add more data sources and collectible categories.


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