I've bought several used and I've been very fortunate. The cost difference has to be worth it to me to take the risk though.
PS. I've bought a couple from forum member here on the DC buy and trade thread and they've been awesome. I couldn't function check them first, but the members had a significant number of posts, had been members for a while, and I could go back and review their threads and posts regarding the weapon to get an idea of how many rounds they'd put through it or whether they had experienced issues or not. Everything was cool in their posts about the weapons and I got some great handguns at great prices. I've been totally pleased!!! Thanks guys!!!