I have a S&W 9mm semi-auto that I want to sell, but I've never sold a gun before and am a little unsure how to go about it! I know there is an area in the forum for advertising, but I thought I'd get a few opinions on the subject first. There must be pros and cons to every method (two-party, online, on this forum, on consignment, etc). I own only 3 handguns, two were purchased online and one was a two-party transfer. All went well. Anything I should keep in mind or be aware of? thanks!