Specialized 21 speed Mountain Bike model EN14764 in very good condition.
Shifts perfectly, brakes work perfectly. The bike has a front shock absorber so it rides quite nicely. (In my humble opinion.) The only problem I have had is keeping air in the rear tire; you may need to do some work on this to get it to hold air; otherwise I think this bike will provide years of reliable service.
I am 6'1"; it seems to fit me well. You can see I have the seat up quite a ways; it could be lowered for shorter riders but it should work well for taller riders. Happy riding!