'Hardcore Pawn' Stars -- Deflategate Balls Are Worth a Fortune!!

They could be the hottest collector's items in the world of sports ... the balls from the Deflategate scandal ... and according to the guys from "Hardcore Pawn," they could make someone VERY rich!

TMZ Sports spoke with Les Gold and his son Seth ... who told us they believe collectors would pay AT LEAST 5-figures for the pigskins ... as long as the seller could prove they were authentic.