So, if it's too good to be true it usually is.
I tried to contact the vendor mentioned above that advertises Aimpoint M2's for $355. Their site claims they are web and brick-n-mortar. Well The listed contact info doesn't work, emails are not answered and the one address I found leads to a tiny, dilapidated, abandoned warehouse/office.
It took quite an effort to find it and once there it doesn't look like there is any life for some time.
I also googled them till I found a police forum that lists countless folks that have placed orders only to never get any merchandise and they too were unable to contact anyone. A couple of people did say they eventually got their orders after 6 to 9 months of waiting. They claim the orderes just showed up long after they had givien up on ever receiving them.
The good news is they didn't charge any of the credit cards except for those couple that actually received something. The lucky recipients were very old posts from last year so these guys are obviously long gone. Interestingly, their domain name was just recently renewed, hum.
In any case the place is
www.tacticalshop.com so stay away if you do happen upon them on the web.