Whats it Worth?: 1970 Chevrolet K20 Custom Camper

First off, let me say I have joined as a Premium Member, so hopefully, I am in compliance with Forum rules. Also, as a quick background, I have or am in the process of restoring several vintage autos (61 Impala, 64 Riviera & 65 Thunderbird convertible), but have never taken on a truck.

That being said, a couple of weeks ago, I noticed this vehicle parked outside practically across the street from me. After driving past numerous times, I finally had to stop and take a closer look.

Seller tells me it is one owner registered, and after inspecting it, zero rust that I could see (thinking it lived its life in So Cal desert, which is where I am). He's asking $9100. Don't know if the engine is original, stamping was hard to read. A/C is butchered. And, its obviously been repainted.

I really dont need another project...but this was interesting, so I figured I'd check with guys who live and breath this era Chevy truck for some thoughts,

thanks
alex