I had a 91 Classic for about 2 years or so. It was an okay vehicle. I had to do some sorting with the ignition to get it to idle correctly and not bog down--it got terrible gas mileage. Some parts were hard to come by--it had a leak at the gas tank float and getting the proper seal ring took some time since it is NLA from Rover.
Rust wasn't an issue on mine.
The ABS system was finicky.
Interior was nice--very roomy and it did go everyehere--very capable off-road--make sure the locking dif works--alot of these were never taken off-roas and the diff lever can become seized--which then takes some sorting from underneath.
I sold it when the front end starting to go. I began collecting parts to do a refresh, but stopped when a decent Land Crusier became available near me. I bought the FJ62 with 260K on the odo and haven't had a single regret. Rebuilding the front end on it took less than half the cost and time it would have taken on the Classic.
The Classic was my second Rover, but since getting the Toyota, I wouldn't consider going back to them.
A couple pics: