For those who may not want to go through the auction site previously posted, here's the stamp they are auctioning at $7500:

(Although, I don't know I would go as far as to grade the stamp XF-Superb.)
Personally, I would rather see the entire pane left intact, but from a financial perspective, I suppose if they can get $7500 PER STAMP, that would realize up to $45,000 for the souvenir sheet of 6, versus $25,000 or so currently being offered for the entire souvenir sheet left intact.
At least the listing goes to prove that one or more of the Souvenir Sheets are being trimmed down to individual stamps for resale on the secondary market.