When I got my Coolermaster 690 from Newegg it arrived in perfect condition. It was in the original box and then inside another brown cardboard box. Between the two boxes was a layer of black foam. You could have thrown this thing out of a truck and I think it would have been fine. It was packaged very nicely.
I don't know if this is how it would have came from anywhere else but my case from the Egg was perfect
Newegg return policy is great...the $20 extra dollars would be worth it to me.