i went textbook shopping (in june--couldn't help jumping the gun a little! ) online... i bought several texts from half.ebay.com, and all but one turned out to be satisfactory. it's been two months, but i STILL haven't gotten my linear algebra textbook. here's the info from the seller: http://feedback.ebay.com/ws/eBayISAPI.dll?ViewFeedback&items=50&userid=lifelongbooks i've seen the "this seller is on vacation" text before. but... now i just saw the words "no longer registered on ebay." what does this mean for me!?! am i out $30+? i contacted their customer service about... a month ago, and this registered on ebay's site. i also filed a complaint with ebay, but it's been silence ever since. what do i do now?