I'm only saying this because you are young. 700 isn't that much, you don't have time to get the original money back, and you probably don't have the muscle. You are already fucked one way or another, steal from your parents or whatever you have to do to get the money, a laptop or an Xbox will get you a decent ways, borrow it if it all possible even if you have to fess up to a family member, as long as you aren't stealing/borrowing from someone thats going to hurt you real bad or kill you. Sell everything you own if you have to. Once you replace the money get the fuck out, go live with your aunt in another state whatever the fuck it takes, if you go down that road you are going to end up a corpse in a ditch eventually. People don't die of old age In that business, often they die young. No amout of money is worth your life. You aren't cool, you aren't a badass, you are well payed canonfodder, nothing more.

Nobody cares that much about $700 man. Just tell them what happened and pay back over time. They'd rather get their money back than put themselves in some major heat. Just make sure you don't fuck around, and reevaluate your choices.