My friend is selling his Ampeg Portaflex b15t for dirt cheap. $350 US + shipping. Full working condition. This link is not to his amp, but to the same model being sold on ebay (for $699 I might add) by someone else so you can check out all the info. PM me if interested, I'll let him know. I can get pics and whatnot.
http://cgi.ebay.com/AMPEG-EARLY-80S-USA-MADE-PORTAFLEX-B15T-BASS-COMBO_W0QQitemZ400022651044QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item400022651044&_trksid=p3286.c0.m14&_trkparms=72%3A570|66%3A2|65%3A12|39%3A1|240%3A1318|301%3A1|293%3A1|294%3A50
http://cgi.ebay.com/AMPEG-EARLY-80S-USA-MADE-PORTAFLEX-B15T-BASS-COMBO_W0QQitemZ400022651044QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item400022651044&_trksid=p3286.c0.m14&_trkparms=72%3A570|66%3A2|65%3A12|39%3A1|240%3A1318|301%3A1|293%3A1|294%3A50