This should maybe be in Suggestions.I think a good way to improve on player on player trading would be to add some auction house type building in NCR. A booth outside for listing items, and a Hinckley type place inside (no weapons or armor) for bidding on items. That'd greatly improve trading.
this isn't wow :S
Worst blockade to p2p trade are alts. It's easier and faster to just craft everything with your alternative character than find a suitable player trader and arrange a meeting.
So what? When it comes to player to player trade, of course we want the best and easiest method to exchange goods.
Fact is, the current trading system in general, (arranging a meeting, taking a risk with your buyer, [guy might keel youu] and other dangers to it) is very fallout-like, I love it. Dark, almost mysterious, dangerous."you want a new gun eh?""Yeah, got some business to take care of.""well just meet me outside of town and I'll have your gun.""deal""pow"
Maybe just remove merchants and let players set their own shops? Hire a merc, put stuff on him, set prices and he will work like a vendor, making money for his owner.