They're a purpose designed tool for tight areas. If you just want to move dirt and have space a backhoe is better
If you want to mow a tractor is better.

But if you need to maneuver, this is the tool for the job.

It's a good price if that machine checks out. You can have him take to to bobcat for a purchase inspection and dicker on the price like a used car
Like hbar said, depends on how it was used. It would give me pause because they had to get a bigger machine, meaning they ran this one hard.