Coats Brand Model S50 Air Powered Pneumatic End Lift Jack.  I have Two available - Price of $450 each.

This is a scissor style low profile jack which operates off a compressed air supply from any air compressor. 

LIFT HEIGHT: 30 inches

LIFT POINTS SPREAD WIDTH: 24 to 57 inches

LIFT CAPACITY: 6,600 Pounds

Clean - Tested and Ready to Go.  

These are out of an old auto service shop but seem to function as new.  I see that another company (They even call it an S50) is currently manufacturing these with a selling price new at $1,350

These are in Dodge City. Call or email (Mitch) if you have additional questions or want to look at them. 

I also have a few other used end lift air jack models.  Bushman Model 410 and Three Gray Portamatics