Lincoln Electric Mig-Pak 15 for $500?

I went to Canadian Tire tonight and they had a Lincoln Electric Mig-Pak 15 (220v) on clearance for $500, worth $750. The only thing is it's the only one and it's the display model. They said they couldn't find the box so whatever comes with it is gone. It does come with the Trigger Cable(?) thats it. I think it is supposed to have a spool of wire, tips, a welding shield and not sure what else. Does this seem like a good deal? Is it a good welder? What do I need to make it run on gas? I hear that the welds are much better on gas. ANY info would be great as they are holding it for me and I need to call them tomorrow. thanks