Don't know if I'm supposed to post this type of thing here but I've been thinking of a bigger pot so that I could do a few 10 gallon batches. Anyway, this pot with free shipping normally runs about $105 - so the $88 seems pretty good. I know that it's not stainless, and not super high quality, but it looks like a cheap way to get into an electric 15 gallon BK.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140355636896&ssPageName=STRK:MEWNX:IT
Edit: Here's the same pot from the same seller for $105.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110437346238&ssPageName=STRK:MEWAX:IT
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140355636896&ssPageName=STRK:MEWNX:IT
Edit: Here's the same pot from the same seller for $105.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110437346238&ssPageName=STRK:MEWAX:IT