It looks pretty reasonable, and the forks probably work fine, but will be kinda heavy and basic. Like anything, if you know roughly what you're doing and don't need the warranty you'll get better VFM buying second hand, and at that end of the market I'd be more inclined to get a 650b+ bike with a rigid fork, ie the Marin Pine Mountain
I know what I'm doing with bikes generally but MTBs are totally new to me - so I'd have no idea looking at a used suspension fork or disk brake whether it was buggered or not. And generally, after only ever having bought 2nd hand or building up a frame, I'd rather buy a new complete bike this time.
It looks pretty reasonable, and the forks probably work fine, but will be kinda heavy and basic. Like anything, if you know roughly what you're doing and don't need the warranty you'll get better VFM buying second hand, and at that end of the market I'd be more inclined to get a 650b+ bike with a rigid fork, ie the Marin Pine Mountain