I recently bought a 2001 Bobcat 322 mini ex. It's a really small machine at 3500 lbs. The hour meter had 1625 hours on it but I think it actually has way more than that. I bought it from a rental company that was in the process of shutting down and selling all of their equipment. He said this was not part of his rental fleet, but he had bought it to repair it and sell it. I got it for $8300.
This machine replaces a 3 point hitch Kelly Backhoe that I've had for about 12 years, but it was about 60 years old. It served me well, but I was going to have to spend more money on it to use it.
One thing to check out when looking at a used machine is the track motors. That seems to be something that wears out on all excavators. They told me they had replaced one of the motors. The other side will need to be rebuilt or replaced at some point. On this small machine, the OEM motor from Bobcat is about $2800, and an 'off brand' motor is about $1500.
Like someone else mentioned, this little machine will out dig the old 3 point hitch I had at least 5 to 1. And, I can carry this little machine on a 16' trailer, whereas before, I had to load my tractor and backhoe on my gooseneck. And, being in the landscape business, sometimes it's much easier to get places with a smaller trailer.