You should easily be able to find something in the $30K price range. Before deciding on a cobra, check with your mechanic to see how famliiar they are at working on carbs and in settling valve lash. If they are not used to working on carbs, then you may want to lean towards a fuel injected car. If they are not used to setting valve lash, then you may want to steer away from getting a car with solid lifters. A lot depends on how much you want to learn to do yourself. Setting valve lash is not that difficult, and you can learn to adjust a carb.
If you find something that you are interested in, take pictures and describe it here and people will let you know what they think, whether you want to hear it or not
Good luck. There are a lot of them on the market right now, so it is a good time to negotiate. Just make sure you go for a ride in any car that you are interested in. If they will not take you out for arid, then wanly away.