https://ianayres.yale.edu/sites/default/files/files/Race_eff...

From 2015: "We investigate the impact of seller race in a field experiment involving baseball card auctions on eBay. Photographs showed the cards held by either a darkskinned/African-American hand or a light-skinned/Caucasian hand. Cards held by African-American sellers sold for approximately 20% ($0.90) less than cards held by Caucasian sellers, and the race effect was more pronounced in sales of minority player cards. "