I got it a couple months ago via a Craigslist ad in a package deal along with a 25 gallon sprayer set up. I have no idea how old it is, although I did find a model and serial number on it a couple days ago.
I'm not trying to level the ground; I'm trying to pick the rocks up e.g. a "rock" rake, that's what I got it for. Having said that, I leveled the field next to my shop a couple days ago, starting with the box blade and the rippers down one hole, then rock raked it. I was quite impressed with how well the RR leveled the ground. Not so much with how it picked up and moved the rocks.
I'm over 60: picking up rocks got old fast when I first started trying to get the rocks out of the field when I bought this place a couple years ago. Hence, why I bought a "rock" rake. It's sole purpose (at the time) was to collect and move the rocks to one place for easier disposal or pickup or whatever. If I have to go over 4-6-10 times, that's not gonna work out too well; way too much time and too much gas.
Since I bushhogged the field yesterday, I should go out and take another pic to show the remaining rocks.
Thanks,