http://onion4euorfs4g6qqv6uwxokda7p5hemzcwbfycbhkkjcq7bh64cqkyd.onion
If the BTC address you need to pay on has already been used, then it's a scam: The seller can't recognize that it's you and not someone else. Too good to be true: Noone is here to give away things, if you need to pay 25$ for something worth 300$ then its a scam Also noone will sell you already laundred money, what would be the point of doing that ?