Havoc relies on vendors way too much in my opinion, and money makes the biggest difference in the game. There's no limit as to how much gear a player can buy, and players have the chance to get infinite money, meaning, well, 100,000 dollars a day is a lot. There, in my opinion, is no, real realism. Though I do agree with your statement, I think there could be a much higher emphasis on survival. A HEAVILY realistic TMD. Which, we most likely won't get just due to the current PVP community. It might be a little radical of an idea, but perhaps a whole other gamemode could be created, that relies on looting, surviving, and facing the elements. Though looting does actually have some fun in it, you can just buy ammo- taking away from looting. If we're going to have a series of vendors, I'd suggest actually having an economy. Auction houses, limited amounts of gear on the vendors, because this idea is useless if you can just buy a stack of ammo in under a minute, whereas it takes time to collect ammo from places.