The EoTech 512 routinely goes on Ebay for over $300 and most close at $350, which is retarded since a new one is $399 and if you bought it while the rebate was going on, it is $370. For the slight price difference, I would prefer to have the new item with factory warranty.
For something like sights, the small savings is not worth the doubt that the sight might be damaged or compromised and have it fail in a fight. Of course, that is probably 99.5% unlikely but for $20, what the hey? It's cheap for a piece of mind.
Cool story, bro... when do you get to the part where you shut up and walk away from me?