Ken, I ran your truck through the NADA and Kelly Blue book sites. I used a zip code from SW Colorado, 30K for mileage, and your sig for options. NADA lists about $28. 5K trade-in and $32K retail. KBB list the private party sell price at almost $29K. It has been my experience that both sites are high. Your truck minus the aftermarket stuff sells here new for about $29K, but demand out there is a lot higher. I think that if you got $26K-27K for it you will be doing good, and $25K is a realistic sell price. The market is horrible right now with cheap money and lots of stock at the dealers. Great time to buy a new one, but my situation is the same as yours. Hope this helps.
PS, if you decide to sell it send me the info, I have some contacts in the southwestern parts of CO and northern NM that might be able to help you move it.