The Wing Dragon RTF is on sale at Hobby-Lobby for $89.
http://www.hobby-lobby.com/wingdragon.htm
The aileron version is $138
http://www.hobby-lobby.com/wingdragon4.htm
Either would a good first airplane. You could also look at the Hobbico Ventura RTF for $109.99, but that might be a little too quick for a first plane.
http://www2.towerhobbies.com/cgi-bin...?&I=LXGFK0&P=7
As mentioned before, the SuperCub is a good first plane too.
Just some ideas...