i think a better statement would be to not buy an oddysea fixtures, rather then dont buy on ebay. there are a couple really good brands on ebay for really good prices. althou the new oddysea lights dont have the fire problem they are still poor quality.
althou looking on ebay now the t5's i see in 36" arent going to do it. they are mostly 2 bulb aor 4 buld fixtures and you need a 6 or an 8 buld