Woot has 50 gal rain water barrels for 59.99 each with flat shipping of $5.00 for the order.
http://tools.woot.com/offers/good-ideas-rain-wizard-50-gallon-4?utm_source=Daily+Digest&utm_campaign=c76f1b396b-Daily+Digest+-+20140820+-+Tools.Woot&utm_medium=email&utm_term=0_c5ca76da11-c76f1b396b-287020870#tracked
http://tools.woot.com/offers/good-ideas-rain-wizard-50-gallon-4?utm_source=Daily+Digest&utm_campaign=c76f1b396b-Daily+Digest+-+20140820+-+Tools.Woot&utm_medium=email&utm_term=0_c5ca76da11-c76f1b396b-287020870#tracked