I have been looking to buy a used truck and just can not make up my mind. I found a truck that I think might be a good deal but since I know nothing I thought I would see if there are any dealers here who can give me an opinion. They are asking 14,800 for the truck and I have them talked down to 13,800 and no lower. All the new ones like this I see listed are 25 and 26 thousand. I checked kbb and nada and they say value is around 16 thousand. Let me know what you think.

2008 GMC Sierra 1500 SLE1 Std. Box 2WD

Ext. Color: Silver
Int. Color: Black/Tan
Miles: 29,506
Engine: 4.3L V6 OHV 12V
Transmission: Automatic

SAFETY FEATURES: Anti-lock Brakes, Passenger Airbag, Driver Airbag, 2 Air Bags
EXTERIOR FEATURES: Tinted Glass, Bed Liner, Fog/Driving Lamps, Tow Hitch Receiver, Automatic Headlights,
INTERIOR FEATURES: Power Door Locks, Center Armrest, Cloth Seats, Satellite Radio, OnStar System, Remote Keyless Entry, Trip Odometer, Console, CD Player, Security System, Tilt Steering Wheel, AM/FM Radio, Air Conditioning, Cruise Control, Clock, Tilt Steering Column, Tachometer, Interval Wipers, Rear Window Defogger,
MECHANICAL FEATURES: Towing Package, Tire Pressure Monitor,
OTHER FEATURES: Lumbar Support, MP3 Player,