I can't judge value by what you have given for information. But I do own 2 MMs and 4 Farmalls of that same vintage. As you have a good collection of Farmalls, you have a pretty good idea of what they are worth in the condition which you see the MMs in. The U MM tractor was the market competitor for the Farmall M, and the UB competed against the Super M. As I see it, the prices in unrestored condition are comparable to what the M or SM would bring. However for the newcomer to MMs, you will find restoration parts much harder to find and are probably more expensive. Many parts are just NLA, including the oil filters, so modifications need to be made. The MMs had some nice features compared to the M & SM, and more cubic inches so it might pull a bigger plow or disc, but nobody much cares about that for restoration. As with all tractors of this vintage, condition is everything, and the tire costs are a biggie. I paid $1000 for my UBE in running condition with usable tires with a MM loader about 5 years ago, but in today's market, I'd say that was too much. Of course the values vary with location.
This is just my opinion, and I welcome the opinions of other YTers.
Paul in MN