Candygirl looks hot, and although I was thinking about it, I haven't got Anastasia :-(

The interesting thing there is that the amount of downloads of Candygirl might be indication of how well Anastasia sold.  So while there's no direct way to know other than from the vendor, providing everyone actually bought her, your downloads might be a good indicator of how well a good character can sell.

If, say, a thousand downloads of Candygirl was a good indication, then we know that Anastasia sold at least that amount.  Not to be sniffed at, that's a surprising amount because Anastasia isn't exactly the cheapest character out there.