That's a Yanmar that someone has hacked on already. That one would need to have near perfect tines, perfect drive line, and be cheap for me to touch it.
That being said, the Yanmar tillers are great and a tremendous value. I've had one for over 5 years and have put many acres under it. I've hit rocks the size of footballs, tree roots, you name it and it's never done anything to the tines. A couple of my customers who have had their gardens done by a couple other guys, a KK and a Frontier, all prefer the condition my tiller leaves their soil. I know for a fact that the Yanmar out tills the Frontier in sod. He's had me come in and do a couple of jobs for him because of this.
My understanding is that the aftermarket replacement tines are junk, though.