Don't mix different variations of cards together in sales data
All sales are aggregated into a single total. For instance, when examining the sale history of a Joe Burrow base card, it includes various types like prisms, refractors, and different variations all grouped with the base card. This mixture impacts the estimated value assigned to that base card. It would be better to separate them according to their specific card types.
If you guys need someone to help alert through and put them in the right place I would love to help out. It would make the prices so much more accurate and that is the only thing missing from this otherwise perfect collection manager