I don't know what you people have against Raul. I sold him stuff amounting to around 10,000$ in one day and he never ran out of money. You can get the most money from selling rifles to him, as opposed to Betty who gives you pittence for junk. Plus, Raul's initial selection only increases, and he offers sniper scopes, laser sights and bipods on a daily basis. He's the most convinient place to get rare ammo like 4.6mm and 5.7mm, not to mention HP ammo (for use against the bloodcats) or 9mm and .45 AP ammo for your SMGs (if you use them). Lastly, he's the ONLY place to find ammo for your precious Barret M82A2 and VAL sniper rifles. His attitude, I think, makes him more interesting as a character.

I've tried killing Raul once and the payoff was way too low compared to what I get when I keep him around. Not to mention its bloody annoying having to disarm every single item he drops. The maxed-out armor he drops is just about the only decent thing you get from killing him.

Stop the Raul-bashing! If anyone, bash Betty; she could really use a good bashing.

EDIT: Okay, he did eventually ran out of money. But I still argue that he's more usful alive.