My 12 year old Scott is having the same problem, the deck is getting pretty rusty. Engine still runs fine, but the deck and everything else wearing out, its time. The FWD doesn't work anymore, its on its 3rd set of front wheels, and the back wheels are starting to bend up.
I found a Husqvarna I like at Lowes for $329, next $50 off coupon I get I think I'll buy it.
Not a big fan of used stuff, prefer just to buy new and take care of it. I paid about the same for the Scott and got my money's worth out of it.