I have a Toro Personal Pace mower. About ten years old. It has the Tecumseh engine, which I didn't realize has gone out of business until I tried to buy a carburetor rebuild kit. Other than the plastic wheel hubs wearing out from a LOT of use, it has been a reliable mower. The problem with the carb--it was difficult to start (four or five pulls) when warm--was the manifold gasket. There is an on-line outfit that bought all of the old Tecumseh parts so things are available.
Having said that, I would not buy a Toro Personal Pace again. The "Pace" part of it means that you push on the handles to make the drive engage. As you walk...your "personal pace"...the pressure which you exert against the handles engages the drive. The effect of this is constantly load your lower back as you "push" along.....and as one who has fractured that part of my body, it really starts to ache quite quickly. The Snapper or Honda (likely my next purchase) effectively "pull" you along as you engage the drive. Many (most?) people would not be bothered with this, but for me, it is a big deal.
Honda's cost a little more, but seem well built, have a good reputation, and will likely be my next choice.
Would NOT buy anything like a lawn mower from a big box store. They manufacture to a price point; for me, I want the units that are made to a quality standard.