what should i ask?

its a 93 EXT cab chevy with 6.5 turbo rebuilt trans, new clutch, good tires, 4x4 standered full ranch hand front and rear bumpers, rubber floors, gray cloth, infinity mids, pioneer head unit and 12 disc changer and daimond audio 10 under the back seat cust air brushed flames and around 160K miles The wing has been removed and we are repainting the roof. thinking of selling we bought a 05 crew cab to pull trailer and i have my 94 for show so...

I just read an article not too long ago in Deisel Power regarding a 6.2/6.5 build up and I would think that you would be able to get between $7k and $10k if the truck is in really good condition. Since you have the rebuilt tranny, as long as you have been responsible with the oil and collant, you should be good to go. The 6.5 is the more desireable engine for most people. I believe it was the engine they used in every model up to the Duramax.

i think about the same 7500- 10gs

put it on Ebay, start the bid @ $1 with no reserve, after a couple of days of offers of cash and trades you will have a good idea of what it is worth. you can stop the auction anytime before the last day or have a buddy buy it if it does not bring what u want
gl