Living on a budget is what I’m all about. One of the cornerstones of living on a budget is buying things on the used market rather than buying new. There are a few things that should always be purchased new: toothbrushes, underwear and sandwiches are a few examples.
For most other things, you can get a way better deal on the used market, and there’s no better used market for most things than Craigslist. Learning how to negotiate on Craigslist is relatively easy. Most people are willing to be bargained with if you’re respectful and informed.