Donald Trump's personal check that bought POTUS rare baseball photos is hitting the auction block ... and TMZ Sports has learned it could go for over $15,000!!!!
Sources tell us a $909.99 check made payable to Steiner Sports Memorabilia back in 2011 bought D.T. a signed Hank Aaron pic and two photos of Yankees teams from the '50s.
We're told POTUS used to buy memorabilia like that all the time as gifts for clients ... and now, the check he personally signed could be the perfect present for you -- if ya got the cash.