I 2nd stikpusher's suggestion on the Pegasus kits. You can look online and find them for under 10 bucks. They have a V-2 rocket, P-51B, Hurricane, Spit, Zero, FW 190, Bf 109 (both E and G models) and I believe they just came out with a Me 262 (those are all 1/48 mind you.) While the detail isn't as crisp as alot of higher end guys offerings, the fit is pretty dang good. Pretty good bang for your buck.
Shameless plug, but here is what one of the Pegasus kits can look like with just 2 days of work and a set of after market decals.