Ayres, I., Banaji, M. and Jolls, C. (2015), Race effects on eBay. The RAND Journal of Economics, 46: 891-917. https://doi.org/10.1111/1756-2171.12115

"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."