The seller claimed that he could provide customized email addresses, but it turns out that's not exactly true.  I paid and gave him a list of custom name addresses that I wanted, he said he could do it, but when he sent me the accounts, they weren't for those names.  (not even close)  When I contacted him and said I thought he gave me the wrong accounts (thinking they were meant for a different customer), he replied saying he was sorry that he misunderstood my request and list of names, but that he had already paid for these (wrong) accounts created (so he wasn't going to fix the problem or do anything to make up for his mistake).   

So I lost money by paying this guy for custom accounts that he didn't deliver on.