I was just poking around on ebay and found this, http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&Item=290262966788&Category=11812&_trkparms=algo%3DLVI%26its%3DI%26otn%3D2#ht_500wt_1182 Thought somebody might be able to use it for $49. According to my quick goat math, it's around 6 gallons. If...