the rocker panel might contribute to cost a little, but surely not 7K!!! im doing a frame-up on my 73 c-10 and it will cost me a total of 10K and im doing it myself, that price includes new engine, wiring harness, and box as well, so i would argue their price is clearly absurd...
heres how far i took it apart last summer, the frame's painted and the cab's primered and on the frame as of now, but not much else for progress this winter lol...