This machine is the power shuttle. Current owner claims the prior owner (as far as he knows only other owner) used it to drag a trailer around at his business, which was on pavement, and that's why the tires are bad. There is a trailer brake controller that has been added, which supports this theory. Fronts are fairly new and clearly replaced recently. Current owner said the fill in the tires is beet juice. I thought that wasn't supposed to rust out rims. Loader is the LA1251 and in very good condition. AC compressor was replaced last summer.
I have looked for this model for sale elsewhere. I've seen a number of units for sale online around the country and prices are either for a ROPS version (this one is cab), notably higher, or the price is about the same but the hours are higher, as in more than 1000 more hours. Of course these are asking prices, not sale prices so it's difficult to know what they are actually selling for.
I'm going to call the local Kubota dealer here to find out what they would charge to replace the tires as well as haul it. I'll also ask them if they know of any issues on that model, and with my description, what they think it's worth. I can't really do much about it this week anyway, too busy with other things. I guess if it's a really good deal it'll be gone before I can get organized. If it's still around in a week or more, I'll have some thinking to do...
I do appreciate all the input. Thanks