hey guys, i saw a Giant boulder today for $260 US and was wondering if that is cheap

I also stumbled aross a Trek 3900 "06", for $375 US, is this worth it?
http://www.melbournebicycle.com.au/m..._lavablack.jpg

Frame
Alpha Aluminum

Front Suspension
InSync Grind 1 w/preload, 70mm

Wheels
Alloy front, Shimano RM30 rear hub; Matrix 550 rims

Crank
SR XCC-150 42/34/24

Rear Derailleur
Shimano Acera