This one looked really pretty good too for $800 on Craigslist. When I tried to open the belt cases, both big center bolts on the outer ends broke of at their captive nuts that are welded on the underside. Also one of the small bolts toward the middle of the mower broke too. So, you may want to try soaking your bolts with penetrating oil if you have the luxury of time. I will be up against easy-outs, or worse, cutting off the captive nuts.
I found the may-pop belts cracked nearly through, somewhat shredded, and lots of rubber dust inside. I had to use almost all of the adjustment to get the belts reasonably tight, and I expect one of them will go at any second.
I did, however, get in my first mow of four or five hours. It does a nice job of making an even cut. What it doesn't do (like my worn and rusted Bush Hog ATH 720) is tolerate backing into places you can't pull it through, as it jams up with only grass going in reverse. It is much less tolerant of less than optimum conditions than my old mower, which would just force into compliance.
I really like the remote grease zerks, but obviously, this is how those bolts wind up rusted solid. Though one should open the cases often to do the belt adjusting anyway, (which probably had never been done by the farmer I bought this from). The bolts and nuts should be made of stainless, and I am thinking of changing out all the bolts that have captive nuts on the underside.
I have found that
Gates has this belt for $61.73.
Let me know if there are better deals out there, as I saw some for much less on European sites.