This was apparently brought up at some point (I believe I was deployed at the time) and deemed not worth the risk for the site. I asked about it again on the mod side recently (maybe a year ago, just to get the background) and basically got the answer I just gave you. I would certainly feel more comfortable buying something used from guys on here than some random dude on the internet, but I can understand the concern and the decision. FWIW, it took several years to even get a Firearms section, so at least there's that now.