I'd have to agree with Steve, this one looks terminal, rust is like an iceburg, you only see 30% of it, the other 70% is below the surface that you cant see, even tell tail signs like the upper front screen turret section corner which is factory lead loaded at the panel join, in your pic its lifting which means one of 2 things, "A" the rust is so bad the lead is delaminating which, or "B" it's been bogged to bugary in the past when the car went to red from the original lime / yellow color which meant it was probably hemraging rust even then.
The pic with the inner drivers door frame just in shot shows pretty nasty rust holes, thats a raer spot for them to start a rust cancer trip, if its that bad there, it will only get worse as you head south to the lower body reaches.
If you could nab it for $500, at least even at worst if you did strip it down and find its all terminal you could salvage the investment you made, but any more would be a lost cause.
Sorry Buddy, and dont take the opinion badly, we all try to look out for each other here.
Cheers
John