Benjamin Franklin 1908 Jumbo 14 perf RARE STAMP!

I have booklets full of stamps. Some I have purchased myself in the $1,000-$4,500 range and some my father has along with a friend that handed my father a rather large and quite expensive stamps in the appraised $5,000-$20,000 per stamp. This stamp is extremely glorious in its rarity, having a INCORRECT mechanic slate and thus reversal of the press!! This stamp will come with a certificate. The card that it’s with is stamped over and over again with the red ink. This entire piece is a wonder:)