Actually, values are up......my 06 NR QC had a sticker of 56k and I bought it new in late 06 for 38k, dealer in Jax bought about 20 or 30 of them and was advertising that price over local radio.....the 06 regular cabs were going for something like 32k from some dealer in the NW US brand new......a year ago, you could were lucky to get 22k for an rc, and 25k for any low mileage qc.....used values have been on the way up since March.....because of numerous factors, used car prices are through the roof.....29k is pretty damn good for a 5-6 yr old truck with that sticker.....
Do some searches, pricing on all used SRT's is UP......way up.....a year ago, I REALLY wanted a 2010 Charger SRT, a local volume dealer had one with 2900 miles for only 32k......a year later, they have 3 2010 Charger SRT's, all with 5-15k miles, all priced over 36k......a year and miles later, the price is MUCH higher......if can get a good deal on a new car, now is the time to dump a nice used car, auction values here in Dallas are rediculous, clean cars are going at or above NADA clean trade-in.....
Regardless, you have a sweet truck.....good luck with the sale......IMHO, don't sell it.....I miss mine every single day.....don't sell it unless you have to....if I remember right, 06's were the shortest run.....also, nicer front end, better headlights, nicer seats, better interior, and the NR are highly coveted.....hold onto it