Know when to sell them on eBay.
The card in question: 2009-10 Bowman '48 Derrick Rose autographed card. Rose's cards are selling extremely high right now with his MVP Award, NBA All-First Team Award and deep playoff run. I think this might be the time to sell this card (as well as the Dwyane Wade auto from the same set). I don't know if Rose's non-rookies will climb much higher. I checked the gold refractor that I sold a few months ago and it is still selling for around the same price. Would you sell this card now or would you wait a couple of weeks to see if Wade can add an NBA Championship to his resume?