About half of the "new" guns I have bought have been the one on the display shelf. They were not collector pieces, so, it didn't bother me. Not a lot of mark up on used guns, so, I don't bother to haggle with them. Used is a different story, though.
A couple of months ago I stopped by one of the local shops and noticed a RIA 1911 in .38 Super. It was odd because very few shops stock anything in .38 Super. It was beat to heck even though it was new. The price was $385, which I didn't think was bad considering. It didn't sell, so, they moved it to the used shelf with a price of $439. It's still beat to heck and it still hasn't sold.