Roller jacks.....

I bought my Snap-On 2&1/2 ton floor jack 20 years ago for $1,000 brand new.
I had to reseal it last year, and while I was at it, I bead-blasted it, and painted it in 2Pack paint. It took 3 months to get a seal kit for it too.
I haven't a current photo of it atm, only a before shot.
I use it every weekend, and for a while, I had it at places I worked at, and was used several times a day for years.

It's basically a copy of a Walker Jack.....one place I worked at had a Walker Jack, and it was a great jack.