You'll get more ammo and caps pretty fast. You can't really get anything at the beginning of the game. You're probably stuck with a baseball bat and a 10mm pistol (with around 30 bullets) for the first little while. It picks up once you start killing actual enemies and selling their loot. The early guns, like assault rifle and hunting rifle, will accelerate the killing process.Originally Posted by rockmanj
One annoyance is that there's a limit on how much loot you can sell. The traders all have a finite amount of caps they can "spend" on buying your crap. Most traders have very little, so after a few rounds of selling loot, the trader runs dry. They replenish their caps pretty slow, so the only way to sell back to them is to buy things from them or pay to repair your equipment.