Chris,
I think you first need to decide if you want one with an open front or can live with the bar across the front. The bar is really handy for doing sit and stand climbing, but isn't really needed. Personally I can't shoot the bow out of one with a bar across the front as it always interferes with the bottom limb of my bow. An open front one is much easier to shoot from, but some people find them uncomfortable being open. They aren't any different than a fixed stand when you are sitting in them though in that respect.
The next thing to consider would be weight. I know you are a young guy so it might not be as important to you as it is to us older guys, but think about how far you want to hump it into the woods.
As far as finding one, I think looking on Craigslist (as suggested by John) or here in the classifieds for a good used one is a good start. You should be able to find a gently used one for less than $200. There is a Summit Viper on the Baltimore craigslist right now for $160 that is open face and would do everything you need it to do. There is also one for $175 in Pasadena, MD. That one is a Timbertall and at 12 lbs is one of the lightest and best made stands there is. I have 2 of them and love them. They have a self leveling feature so that if you misjudge the taper of the tree, you can level the platform and the climber when you get to hunting height.