Kubotas are a market of their own.
The guy I lease my big field to has a fleet of 300hp and up Deere's and CATs, and, new, each of em is well over a quarter million bucks.
Horse trading on price on one of those is possible, and can save a bunch.
But I live close enough to a big city full of rich guys that Kubotas are worth as much used here as new. Everybody with a Farmette wants a Kubota, and used ones around here sell for as much as new ones, in a week.
I find the market for used Kubotas to be kinda like that for used Toyota Pickups- that is, the used ones are all larded up with every accessory, and long term, relatively high interest loans- so the guys selling usually NEED to get top dollar, to pay off that loan.
Whereas, if you dont need ever single add-on and doo dad, you can usually buy a new one for less than the available used ones.
The same way you can buy a stripper new Toyota for ten grand less than the average used one with every luxury upgrade, and where the guy is upside down on a 7 year 20% loan.
If'n you were talking over 50 hp, 2wd, then, suddenly tractors are a whole nother market. I can drive a couple hundred miles into the farm country of eastern washington, and get a real tractor, for half what a tiny used Kubota goes for- but it would be 2WD, and, often, gas, not diesel- the older ones all are. Heck, I have seen great tractors for a couple grand like that.
But anywhere near a big city, where you have the landscape studded with $25k Kubotas with backhoes and belly mowers sitting on 2.5 acre spreads, and the chances of finding a deal go way way down.