You can find some awesome deals on Craigslist. Just pick your geographic area. I've seen tank stands going for $20! It all depends on who is selling. If someone is moving they usually offer stuff for a pretty good (low) price. The only catch is that most people want cash and pick-up only. good luck! oh, I've also heard that Petco has a spring-time $1 per gallon tank sale. I'm not sure if they advertise it very much, it usually is only for a day or so, and it is only for what they have in stock but it might be worth looking into. I'm hoping to pick up a 75 gal this way
