My 14 year old son got heavily into downhill mountain biking. He bought a new bike and wants to sell his first bike:
It is a custom Specialized Big Hit FSR 2 2010. All new parts. This downhill biking seems to be all the rage with boys - they ride at COP.
I will look for his ad on pinkbike . . .
http://www.pinkbike.com/buysell/1875134/
Mainly good for downhill, not level terrain.