I have a bag listed on eBay with BIN $900 (immediate payment required) and best offer. I received quite some offers. But one of buyer has only 4 feedbacks, and the most recent feedback was given in 2004. I looked up his/her recent transactions. There has none. This buyer gave the best offer of $900 instead of BIN. I have a doubt if this account has been hijacked. Am I too suspicious?