I was surprised that the owner of my tiller made some custom tines that replaced a few of the original ones. It's belt driven, but doesn't seem to have issue.
I'm fortunate that my old Generator sat for 1.5 years and fired RIGHT up when I filled the fuel. The prior owner installed a shut-off valve to the carburetor. Turn the shut-off valve, and wait for the bowl to run out of fuel. I very rarely use it, but I'm sure it's time for an oil change.
I agree, buy the right tools to last. That being said, in a pinch, I bought a $69 weed eater at Home Depot 4 years ago (I think I forgot my check book, and only had cash to buy that one). I can't believe that cheap unit is running strong all of this time later. Keep in mind I only mow a couple of small city residential lots, nothing high demand. I think ethanol free fuel keeps this weed eater running well.
I can't recall the brand of the old 70's/80's 22" push mower that I picked up for $50, but the guy said it was his father's, and he had put a brand new briggs/stratton engine on it a year prior. Nice higher horse engine. He moved to a big lot and decided he no longer needed the mower. It was unusual in the fact that it has a VERY heavy duty aluminum deck. It'll never rust out! I bet I'll have this thing for a life time.
SIDE NOTE: I do NOT put ethanol fuel into ANY of these small engines. Not even into my cheap spare power mower that gets used for a rocky part of the lawn and thrown into the truck to be taken elsewhere. I drive an hour away to buy at least 5 gallons of ethanol free 90 octane fuel twice per season for all of the small engines.