There is a "flat tire" on
ebay this second, 9 hrs to go, 42 bids, at $98.
In the old days, such varieties were a LOT less common... it seems to me either A) the USPS has forgotten how to print quality intaglio stamps B) they purposely allowed imperfect sheets to pass quality control C) everyone is getting on the bandwagon and making common flaws into $$.
I have seen plenty of common, low value US engraved stamps with one color ink getting into the wrong places, and they are not worth a premium. So why are these?
Time will tell if any of these stamps hold their perceived values.
BUT, you will ALSO note, how much interest all these "flaws" have created. Even though we collectors keep saying how bad this USPS marketing ploy is! :-) :-)