I'd love a Dart wagon (also called guayin, vagoneta) 80-81 model, Slant Six, three speed manual on the column, don't care if it has AC or not, preferably with a tan interior, don't care what color outside. Running/driving but doesn't have to be perfect or pretty.
Alternatively, a 1977-1979 LeBaron wagon would be terrific too. Probably more likely to be a 360 engine, I don't think they did a lot of 318's in Mexico. Something about cars sold there had to have engines made there. It's the reason you don't see 4-cylinder Chevy Celebritys, because they made the 2.8 60 degree V6 down there but not the 2.5 Duke. But damn near every Celebrity you see down there has a manual transmission, even the sedans. 4-speed with shift collar through 1986 models, 5-speed from 1987-1989.
I'd also love one of those 5-speed 87-89 Celebrity sedans.
For conversion I use xe.com, and right now it takes 19831 pesos to make $1000. So a 125,000 peso vehicle is like $6300. That's NOT a bad price.