Don't set your heart on an M diesel. If it is in tip top shape they will want a good bit. If it needs work you will put LOTS of money into it and be on a hunt.
Hs and Ms are fairly routine here. You will get a good running one with fair tires here for $1000. I bought one a couple years ago for 8 bills (an M) and haven't done a thing but change the oil. It came with power steering and live hydraulics.