A SUPER RARE Colin Kaepernick football card just sold for over $20K at auction ... and at least $5 grand is being donated to the quarterbacks charity!
As we previously reported ... the 2011 Topps Platinum Rookie Patch Autograph Red Refractor card featured a patch from Kap's rookie season jersey, and his autograph.
The 1-of-1 card was put up on the block at Goldin Auctions ... and ended up selling for $20,400!!
Pretty awesome ... considering the card was originally part of a regular pack of cards.