My friend definitely wants a full suspension, so unfortunately the hard tail route does not work .
I think second hand is definitely a better route, even with that great sale offer.
The trek seems like a fair price. He is around 5ft 10, so might be on the big size?
Not a fan of Konas, no real reason.
A trance or a stumpjumper sounds like a good shout, will have to see what they go for.
It seems a bike with around 120mm travel, reba and slx drivetrain is not possible for this price?