Are they aluminum bodies or steel ?
About 10yrs ago, I paid between $100-$150 for each of my A17's. A little more for the Aluminum ones, a little less for the steel one. I think the prices are still about the same, but ebay prices are higher than what I see on the local level.
If you sell them and have to ship, don't put them in cardboard boxes. Build a padded crate out of scrap plywood. No matter how well you pack a cardboard box, it won't survive the mass rolling around during shipping. I've seen the results, the cardboard was in shambles, the crates were perfect.
(I bought 6 RR jacks from 10ton to 25ton to lift a house)