Rust.
70’s-90’s Japanese cars are a no-buy when any rust exists. It’ll spread like wildfire. Looking at the pics, if I had to guess someone took good care of this car until fairly recently when they started doing dumb stuff like driving it in the winter (not really what an MR2 is designed for).
My MR2 is 8 years newer and it still costs me a lot of money. These are old cars. If you’re not ready to sink money into them to keep them on the road, they’re not for you.
Specific to the MR2, everything is harder when it comes to working on them. Access is more difficult because of where the engine is. This is going to be reflected in what you get charged by mechanics to do work on them.