There's one on ebay and if the pics are legit, then it's authentic (I have no affiliation to the seller/listing)
Saks had it for $697 when the huge sale hit, but it sold out ASAP.
Saks in Beverly Hills has the patent version at that price, in stock right now.
Otherwise, it's full price at YSL and not going on sale any time soon b/c they are carrying the nubuck version forward for next year
Bluefly has been sold out for ages.
Anyways I know all this b/c I was in a mad rush for one.
If you call an SA at Saks, they will be on the look out for any returns they get (which has actually happened once shoppers get buyer's remorse!)