I went to Petco yesterday and was tempted to buy a 55G for $55. As the owner of a couple nanos I eventually want something larger for a FO non-reef safe tank. I thought about it a bit though and I still need a stand, a hood, lights, filters, etc and piecing everything together is probably going to cose more than buying a complete set up in good condition used (or possibly new). It is still a great deal for those with extra equipment already or those looking to set up a refugium etc.