Hey davejk...
Depends on what you want....
If you are just looking for a basic stick with 6-10 assignable buttons and maybe a twist rudder-- Logitech and Saitek make great sticks for under $50-- I myself have the Saitek Cyborg as it is a stick that both left and right handed people can use....so me being a southpaw, this one is the best for me.
However, if you are looking for something with more programmable functions...and maybe a separate throttle as well-- I would say go to the Saitek X45 HOTAS-- it has many more programmable functions for the jet sims like USAF where there are different systems....or like for FB where there are many many user-programmed key functions. Brand new-- it is just at about $70...although as I said above, I bought a reconditioned one from Saitek for half that price and have been using it for a while now....my only negative about it is it is right handed (as I suppose all real-life plane controls are-- so it took some practice, but I have the hang of it now ;)