kyhuntertoo,
First off, welcome to the campfire.
One thing I've learned about traditional bows is that if you buy a good bow and you don't particularly like it, you have a good chance of trading it or selling it and not loosing much on it, particularly if its taken care of and its a desireable bow. On that account, most of the bows in the tradgang classifieds are priced well within reason, and not overly inflated like you would see on the auction site. Members on this site are not typically the kinds of people to try and make money on bow sales.
Secondly, I would recommend something in the 58-60" length for someone just starting out traditional. The longer lengths are for the most part a smoother draw and more forgiving to shoot. The shorter bows tend to amplify the flaws in your technique. If you prefer a short bow, there are plenty of 52" and 54" bows out there that will accomodate a 28" draw comfortably.
And lastly a self bow is a bow that is made from one stave, worked down by drawknife, hatchet, or some other tool. If you do a search you'll find some older posts of buildalongs done by the members here.
Good luck with your journey. Tim