Both accounts have a similar amount of feedback (52 & 53), and both are 100% positive.
Checking either one of those accounts' "feedback as a buyer" links yet another account - "seller.gameia" - a seller with 353 feedbacks (99.3% positive). WTF! Can an illegitimate seller even acquire so many unique feedbacks?
There are a few transactions between these sellers that involves items worth a few thousand dollars.