I had 3 in the shop. Guy that comes around and does a mobile service "rebuilt" them and took an old one that we got free in a tool deal years ago. No idea on brand but the 2 we kept are a black hawk and an OTC. Both well built ones that have lasted years but just did not have the lift. Well they worked for awhile. Now the OTC will just be sitting and pee all over the floor and the black hawk lifts about half what it should in height. Yes they are great jacks but obviously the rebuild kits are just that but a temporary band aid on throwing them away. i do agree that how many of the new ones will still be around 20+ years from now. I would say none unless they are just sitting and never being used.