what kind of plane? how big? fast, slow, indoor, outdoor, 2 channel, 3 channel? lots of options for ya
the companies below carry some RTF micro planes. theres seems to be a size gap between micro planes and park flyers. it would be nice if a big name company produced a 10-12" 3 channel plane that didnt cost more than a couple hundred dollars. there's probably some out there, i just havent seen them.
http://www.bsdmicrorc.com
http://www.slowfly.com/index.chtml
http://www.bphobbies.com/
http://www.roomflight.com/
nick