Stopped in to Lowes the other day while waiting for my Bobcat tire to get fixed. Noticed rows and rows of white, food-grade 5 gallon buckets for sale. They also had 2 gallon buckets that looked pretty good too. The 5gal were $3.78 IIRC, and the lids were another $1.25 or so.
I love my LHBS dearly and try to support them as much as I can, but their buckets are like $15 each, and they're an hour-and-a-half drive away.