The reverse does have the "P" after the year (restrike). Probably a gold-plated version of the official restrike, except the weight and size are certainly wrong.
Do you remember the story about the woman who sued McDonald's because she spilled coffee and it burned her? Now all the coffee cups at McDonald's must carry the notice:
"CAUTION: Contents are hot" or something like that. Sometimes, I think there should be a limit to liability due to pure stupidity. Anyone who spends that much money on rare coins should not be buying them on eBay, period. My limit is about $200, and I don't ever intend to go over that unless I have dealt with the seller in question before (and not just once, for the more expensive things). There are also many issues having to do with postal transport, insurance, etc.
There was recently a seller from Malta with not one, but TWO 37-1/2 rouble gold coins (maybe the first was relisted?) The images of that coin didn't have the "P", and it went for about €1.500. Couldn't do anything about that seller, either.