5. Hit Up Ammunation
One of the first things most players are going to want to do is hit up Ammunation and use their new-found wealth to arm themselves to the teeth. The streets and deserts of Los Santos and Blaine County are dangerous enough on their own - through into the mix a group of crazed, online gamers and things are going to get very hostile, very quickly. Fortunately, with your $500,000, and depending on how many reputation points you've accrued, you can make yourself a worthy adversary to any opponent by stockpiling on heavy artillery. Whether it's a rocket launcher you're after, or the Gatling gun, you can invest some of your cash on making your character a force to be reckoned with online.