Wow. That's what a Toro should be. I think I see a roller bearing on the crankshaft even. Quality stuff there.
You are a gentleman sir.
Interesting that it was $ 880 in 1990
So annualized over the 29 years that you have owned it, the grand price of $ 30/yr and it will probably run another 20.
Ask some one to pay $ 880 for a mower now days and they will call you a robber , let alone the 2019 equivalent of $ 3790 ( and that is just inflation ).
A prime example of saving a fortune by spending more on a piece of quality kit something that most people can just not understand .