How about a $160GP.40 size Big Stik? Or the $120 (on sale) Tower Razor 3D?
But the trouble is no matter how Iadd up ARF, engine, prop(s), four or five servos, two servo extensions, fuelpump,(and even assume hand start with chicken-stick) Ihit$300 prettyquickly. Hopefully you already have a receiver to use or you won't make it. The Super Tigre GS-45 and O.S. .46LA enginesare $85 to $90.