Be careful before buying any account or code without using a trusted escrow.
Don't make a big discount tempt you not to think about guaranteeing money.
to @OP: Can you provide a more effective escrow method, such as Bitify.com or Bitcointalk escrow members
1?
I mean that Auto-Buy URLs (selly.gg) are just links to the delivery codes and not to ensure value.
[1]
https://bitcointalk.org/index.php?topic=2439910.0