Agreed, I buy big trucks just for parts in better conditon I have never payed more than $400 for a complete 47-54 2-tonner. For example this is my latest purchase as stated $400 for the whole thing, comes with a title from the original owners!
Keep looking and make sure bigger is better for you.
There is a great atrticle in the Tech Tips on living with a big truck and the potential up's and down's!
http://good-times.webshots.com/photo/2139999190102454676fHdLum