The MF 1529, which I bought, is a pretty clean tractor, 530 hours. However, I believe it spent most of it's life out in the weather. Many of the parts were seized, due to rust/oxidation, ... i.e. the draft bar stabilizers wouldn't turn, seat arm rests wouldn't move at all, wheel lugs required an impact tool to break them loose, etc.. The hazard/turn signal lights were wiped out ... one was totally missing.
I found, that buying parts for the MF is quite cumbersome, compared to the Ford NAA, which has a multitude of sources.
So, my efforts so far, have been getting things loosened up, changing fluids and filters and paint touch-up. Otherwise, it seems to be a solid tractor.
Additionally, I shortened the top section of the ROPS by 16", as it stuck up so high, I couldn't get it into any of my buildings, without folding it down. It's still over a foot higher than my head.