I've always wanted a remote control jet plane but just the jet motors are like $2000.

I've been through a bunch of those foam Air Hog things. They fly great for about 5 minutes when you crash it and it never flies again. I still want one of the helicopters King_Snuggles mentioned. Just to torment my roommtes and dog. I did help my friend build a gas RC truck once and that was fun and $500. lol Like Wolfgang said, it's and expensive hobby. So much so that I never really took it up after getting interested. You should search YouTube for "fastest RC plane", you'll be amazed.