That sounds sketchy, even if it isn’t a scam, i would say that service like that says a lot about the seller. I went through with a purchase in a similar situation and thankfully it wasn’t a scam, but it certainly was a rip off. The ad sold me my boa as female but he’s very VERY clearly a male. And old enough when i bought him that there wouldn’t be any room for debate. So, maybe a scam, maybe not. But probably not worth it.