Help me decide on a floor jack

I was introduced to the air bumper jack in HS auto shop.
Since then I've always wanted one.
Finally, about 12 years ago, I accidentally stumbled onto one at a place I was buying other things at.
It had been stored outside for at least a decade but still worked.
(I have never seen one that didn't work.)
For $100, I couldn't lose.
It's like having half of a lift.
As luck would have it, I found another one right across the street from my shop about 2 years later for $125.
Exact same model Gray brand.

You have to be creative if using them on cars that have valance panels below the bumpers.
Some come with adapters, but they are steel and can scratch or even crease bumpers.
I made rubber cushioned adapters from gm slot bumper jacks. They work great.
I also made pinch weld adapters, so I can lift one side of more modern cars.
(Gotta be careful not to tip it over, though!)

However, the cheapest I've seen one for sale locally in the last 5 years has been over $500!