I've gone to a bunch of RS looking for the M-80s and the quality of the salespeople/managers varies tremendously. There have been some very helpful people and some that were just plain nasty. At one store, they had an empty box on the clearance table and had the headphones in the back--for anti-theft purposes (so they said, seemed odd to me). When I asked if they were demo phones, they damn near bit my head off and said they never sell demos. I checked to make sure it was fresh and it was ok, but I got the stinkeye--lol. On the other hand, a very nice lady at an out of the way store is sending M-80s to my local store.
I remember auditioning M-80s and not liking them, but for $40--they're a good deal. Bass is little boomier than I like and they could resolve a little better, but they're not bad and the build quality and accessories are first rate.