For sale is a Left Handed Comp-tac Infidel; comes with the belt clip. I just purchased a handgun and this came with it. Looks virtually brand new. Asking price is $55 shipped. New ones are $63 plus shipping. You can read about them here Inside Waistband Holsters - products new home - The Infidel Holster
This is for the M&P compact. I am not sure if it will fit full sized models.
*Note* Selling the holster only, gun is not included.