Suburban value question

[dave666693]

I have never owned a Sub or a big block. A friend of a friend has a 72' 3/4 ton 2 wheel drive for sale in pretty rough shape. The big block 402 is the original and has had the top end recently rebuilt including the heads, cam and timing chain. It is a 4 speed with a new clutch. It is rusted in the usual places but not as bad as some. The guy wants $1200 for it and I think that is too much since it hasn't been driven in a few years. With the decent motor what would you say the value is?