I get the OP's point though. You can't say that it's not anyone's business what someone prices their stuff at, and that you should just keep your opinions on price to yourself... Then add a "good deal" button.
You need a license if you're buying guns for the sole purpose of reselling them, profit doesn't really matter.
For instance, if you bought a cheap $500 AR a few months ago for yourself, and now see you can make a dime off of it there's nothing wrong with selling it, as long as when you...
I don't understand it either, but what's really insane to me is when they want to buy something I have, and I tell them I'll ship it, then they say that's too much trouble but want us both to drive an hour+ to meet.