I am trying to get a old Sesantion commercial self-propeled walk behind running for my VERY hilly 3/4 lawn in New Hampshire. But I am running into parts issues. What do you guys feel is the best self-propeled walk behind I can find used on Craigslist out there. Toro are great by 2 strokes low on torque are not good on long grades. Front drives loose traction on up hill pulls un like rear drives so that leaves the Craftsmans out.