I have a slightly used Aimpoint Comp M2 for sale. It's currently in a Warne Maxima 30 mm QD ring, but I have a worn-around-the-edges QRP mount I can swap it for. It also comes with a Tenebraex Killflash.
The sight has a couple of dings (one on the power switch and one on the ring around the eye piece) and it picked up some light scratches in the coating on the eyepiece end sometime during cleaning. Otherwise the objective is perfect and it is in overall excellent condition.
I'll offer a 5 day inspection if you have any concerns. Asking $315 (+3% for paypal, preferred) shipped.