I bought a 4 pin TruGlo a few years ago and really like it. It is not expensive, either.... I think I even got it at WalMart.
If you already have a bow and are looking to save money on a set up, I would find a good sight at a lower price...such as the one I mentioned and spend a little more on a rest.
Also it can really help to have a good bow tech. set it up and help you tune it....could save some time and money in the long run.