>>50243219for most cards it's actually okay as long as they have enough volume that the market price is accurate. What happens sometimes is a card will have no sales for a long time but a bunch of new listings at a lower price, so the market price will be too high. At least I think that's how it works.
Pic related I bought from him recently for something like $2.13 on the dot, it's like $4-$5 on ebay
