mate, believe it or not , some kids have become millionaires by just simply buying and selling shoes.
My cousins 15 year old son is into it big time and he wants to do this for living. He went to USA recently just to buy the latest Michael Jordon shoes for $2500 USD and he said he got it cheap including the airfare.
He reckon in few years he can sell it for 4 times its buy price.
At the moment I only see him spending his parents money on shoes. I think in few years time he will find kids like him and he will sell it to them for a higher price and then those kids will sell it some other dumb kids few years from there and the cycle will continue on.