Someone paid $7500 for a Gem Mint 10 Revival #1 SS double signed, and it basically went exactly the way the $12,500 sale of 9.9 NM 98 went - People talking about the investment side, the buyer stating that he has plenty of bread and it was something he wanted. In this case, the Seller pitched his in as well, which I think eventually happened with the NM, as well.
In my opinion, everyone should be able to give their opinion on all aspects of the deal. As long as there are no insults or ad hominem attacks, it really should all be fair game.
In case anyone wonders, I think it is cuckoo for cocoa puffs to pay that price for that book, but both the buyer and seller seem really happy. So it has brought joy and happiness in the world, it can't be all bad, can it?