(I browse ioffer)
and there doesn't seem to be any fakes m51 jackets out there.. yet.
and yes, there are fakes of the mechanics. In fact, the most common fakes I have seen are the ugly leopard nuptse jackets which I think are slowly creeping onto ebay, the TNF mountain shell, mechanics jacket, and the leather down jacket. But hopefully if you're willing to drop that amount of money for those pieces, you're going to do some research before you pull the trigger. but I really only know of ioffer.com as a source so there may be other fakes sold elsewhere I don't know about.
keep the questions coming. I'm happy to help.
i just checked it out and its crazy the stuff theyve faked. the leather down jacket, hooded denim shirt, 8 ball shirt, cliver crew, atelier pullover, pretty much every north face ever. they even have fake 77 and black moses tees for more than they cost retail lol. at this point i guess its safe to assume that everything could be fake. the game is gettings fucked up