Selly.gg has become the ultimate choice of scammers nowadays who offer that they sell accounts.Once you send your btc,it would be immediately sent to the sellers but you will receive an e-mail which would have no details about the bought account.If asked,they would reply that whatever the seller provides,they send it.Surprisingly the product details would not even have any Username and password. It would just have the word account for sale in the email received.So just don't lose your hard earned money using this selly.gg website.
Here is the link of a spammer who uses selly.gg to scam the buyers
https://bitcointalk.org/index.php?topic=4546231.0And also,you could find the threads of such spammers being locked by them so that no buyer who has been scammed could post any complaints in those threads.