It looks like a fair car if you can get an idea of the rust, I was watching that one but don't have time to look at it better.
Rust, rust, rust, I have a 76 parts car that looks great as you walk up to it but the floors and the trunk are gone, not just bad, totally gone.
The rust is the most important thing, the ether problem is just these blasted glow plugs, first mod should be the fast glow kit from Fastlane. If you do need engine parts, they are easier to find than a rust free body.
Last year there was a running car, interior rough and very rusty in the neighborhood for $100.00 and there is one sitting between Wilmington and Myrtle Beach on Hwy 17 also in rough shape that you should be able to get for a couple hundred dollars, both 75-76 300d's if you do need parts.

Good Luck

__________________
Ncnetman
1978 300cd fresh paint
1965 Mustang
1968 Torino GT fastback
2015 VW Passat TDI
1969 Ranchero- project
1974 240d 4-speed -for sale
1976 240d - for sale
1990 6.2 Suburban 194k-getting a 6.5 turbo
2008 Duramax Silverado-totaled
1959 Chev 3100 Fleetside - sold