Its a Import, ONLY Judging by the Size of the Pallet compared to the Width of the Jack, Im leaning towards a 10 ton. That Design has been around awhile and sells anywhere from $800 to $1500 depending on what Color/badging you want Sunex/Otc/etc... If you cant Inspect it prior to purchasing.. I wouldnt give more than $150, I Used to buy alot of Government Auction Jacks and that stuff is Generally Abused and sits in a Yard somewhere for Years prior to getting auctioned off.
I guess it also depends on whether you buying it for Personal use knowing that it probably needs some Work or buying it to Resell.
BTW.. If its Only a 5 ton.. Versus the 10 ton.. Cut that $150 in Half.