I'm thinking of an 84 K30 that has all the original 1 ton parts, except it has a 454 from a motorhome (with a total of 30,000 miles, same as the new TH400 tranny) and the 14FF has been rebult with matching 4:10's and a detroit, which is new. The truck is in good condition, has A/C. Owner used it to pull a car trailer, not a wheeler. Truck itself has around 200000 miles on it, but as said, not a wheeler. He wants $4500 for it, is this reasonable?