My wife asked for a rain barrel for her flowers. Our water bill has added up again and again, so I started checking craigslist for possiblities. As luck would have it, I found a polytank that was original used for similac baby food storage. That was great, since I didn't want to worry about chemicals in the tank killing the plants and garden. The seller offered to deliver for the $35 purchase price. Great deal!!
The first thing I did was to go to the hardware store and get connections so I could hook up my downspouts. I found black plastic tubing that was cheap and useful.