Woo I just picked up a 55g for $4!!! I got a free 55 with another tank that I was planning on using as a sump but the trim on the top and bottom was cracked in the middle. I checked for replacement frames online but somehow the tank was .25" longer than the standard size so I was just going to use epoxy on the cracks. It held water and probably would have been fine as a sump but it still made me nervous.
Last night I remembered this sale was going on so I decided to post the 55g on craigslist for $60 along with an old light, heater, and some gravel, hoping to sell it before the 25th. Less than an hour later someone emailed saying they wanted it (at 4:30am), and by 9 we had it loaded in his truck with $60 in my pocket. The brand new 55 was $64 after tax and they even helped load it in my car