Buying a used lift worth the savings?

I bought my 7000# challenger 2 post out of an old shop that was liquidating and closing. Yes I had to tear it down, get it on a trailer and erect it back at my shop but for $600 I cant beat it and I am not rolling around on the shop floor on a creeper.

I probably would have to wait a bit longer to get a comparable lift if I went with the same quality / ALI certified piece new.