It wouldn't be out of the question for a customer to place such an order with CZ-UB. We've seen such special factory guns appear over time, like the RSR nickel plated CZ 97Bs, or the recently seen Omega 75Bs. Given the existance of these guns, I don't doubt that someone somewhere wouldn've ordered a special run of nickel SP-01s.
However, this auction claimed these were factory prototypes, which would be something completely different in the eyes of a collector. When selling something like this, its best to have proof of such a claim, and if you're a buyer, you need to ask for that proof, ESPECIALLY when the seller is asking such a high premium.
Gun owners have to protect themselves in more ways than one...