Info/ mike tyson rare prototype card / i own only one to receive a gem mint bgs 9.5

[fowler48k]

Just wanted to know if anyone has any idea how many of the 1990 Kayo Mike Tyson Prototype cards were made and any idea the value? Beckett has only ever graded 13 of these over the last 20 years and currently there are only 2 on Ebay right now and those are raw upgraded and they are both priced at 300 bucks so thining this card should be pretty valuable seeing that its selling at 300 raw and only one ever to get gem mint grade from Beckett and after searching PSA it doesn't appear that PSA has ever even graded one of these EVER. Any info/input would be much appreciated!!