We found a listing online for 55 gallon plastic drums. Said they had been uses previously for rainwater and before that had ceramics in them. I plan on buying two of them but am wondering if I should try to scrape up some more cash and buy an extra one or two. This is the first time I've found them for sale at a reasonable price and I don't want to go down the road and wish I had picked up an extra. Do you think it'd be a wise investment to get an extra one or two? They are only $6.