The 2009 Topps #321 Stephen Curry rookie card reigns as the crown jewel of modern basketball collecting. As Curry’s flagship rookie—featuring the Warriors’ classic logo—this white-bordered icon blends rarity (just 372 PSA 10s) with historic significance (revolutionizing NBA shooting). From $700 raw copies to the mythical 1/1 Superfractor (worth millions), it’s a grail for collectors…