I can vouch for them as I had the same skepticism at first like many as mentioned here: http://auctionessistancereviews.blogspot.com/
Have dealt with Lobbay, troydes.com which apparently someone told me they are also owned by Lobbay.com (go figure) bought from them and heard nothing as of yet from Troydes.
After dealing with these people I was very hesitant when coming across Auctionessistance.com. I had to make sure that I wasn't going to get scammed again as I needed an account badly to start selling. So I talked to to them via live chat on how they can prove to me that they won't scam. They were honest and aware of the other sites I mentioned. So after the chat, they reassured me that they weren't going to pull anything funny and promised if they didn't deliver that they would offer refund. Hard to take someones word after being scammed so many times, but I decided to purchase.
After 24 hours or so, they actually delivered what was promised! I logged in and made sure to check everything to see if anything was suspended or limited to which it was not. The information they gave me as well to keep the account running and avoiding eBay suspensions & Paypal limitations was also very helpful. I can definitely say with confidence that I will be coming back for more as there are not to many legitimate account sellers anymore from what I hear.