I got mine from E bay also, don't recall the vendor, it was over a year ago (you can see it's not an urgent thing for me). If I had seen the one you linked to, I would have snapped it up. I think I paid about $66 for mine, and it is a 6" stroke, with, if I recall, about 110# capacity. At the time it was the most reasonable I could find. I think the seller was advertising them for use on car projects, like opening hoods, trunks, etc.
Keep telling myself to get out and finish this project, but the complete lack of snow this year doesn't seem to make it a priority.