My son is starting to get more and more interested in trail riding, so looking to spend about $3-400 or so on a decent ride and see if he sticks with it. CL is littered with overpriced 10+ year old bikes, so thought I'd try the group here.

Looking for something like the $200 stumpjumper I missed out on the other day   
26/27.5 wheel, 17.5" frame, front suspension, disc brakes, etc... He's 15 and about 5'8"

Thanks everyone!