TheChamp,
The YM1300/YM1300D (the D means 4x4) is a very solid tractor. 2 cylinder diesel, about 15-16hp. In my opinion, it is about as bullet proof a tractor as was ever made. The YM1300(D) is almost identical to the YM155(D) which was sold in the U.S. by Yanmar. While there are some issues with parts availability when it comes to such things as gears, most parts are still available from Yanmar. Due to the fact that it is an almost clone of a built for US Yanmar, parts availability is normally very good.
$2200 for a YM1300D with MMM is a very good price if the tractor is in decent shape. If it is only 2wd, then its still a decent price. Do you know what MMM is on it? The original equipment MMM on the YM135/YM155/YM155D was a YMM45, 3 blade, 45" width, driven by belt from an electric clutch on the front of the engine. The mower complete alone is probably worth about $700-800 in good condition.
I have never heard of a YM1330.
Greg