Yep, you roll the dice buying surplus sight unseen. Some look better, some worse. As long as the barrel is OK you should have a good shooter though. The dents and scratches should come out alright if you want to do a quick refinish, couple threads on that here recently.
Remember the gun was likely dragged through the worst fighting of WWII then stripped, put back together with whatever parts weren't broken in the war, slathered in cosmoline and jammed in a crate for 50+ years. Then someone bought it out of storage, trucked it across Europe and tossed it in a boat headed for Canada. Dents and dings are to be expected. Sorry you got one that was a little closer to the rougher end of things.