You should spend some time in the http://straightrazorpalace.com/aucti...bay-101-a.html thread as well as other threads in the ebay section. As you can see from the razors you were considering you have no experience to tell a razor in good condition from a razor in bad condition and that is the most important. So the risk of just wasting your money is quite high and you should work on reducing it by learning more.
The type of razors you are after with your budget tend to require significant honing all the way from repairing the edge to finishing it. That's a significant barrier and requires honing equipment and skills. Have you considered this part? What hones do you plan to use to make your razor ready to shave?