If this is the only list you have, there are many more where you can bet on Sportsbook.
Instead of buying accounts from someone who lost a lot of bets, you can check playbet.io let's see if they are going to limit.

I don't think someone is willing to sell their account; most of the casino these days is asking for KYC. So I guess no one is willing to sell their account for just a small amount it might affect his privacy, and also, how can they trust you if you already have a negative trust?