My nephew who is 14 has quite a little scam going, he goes to the pickering flea market when they have all the cosmetics sale going on. He buys the hair dye for like 3 boxes for 10 bucks. He then walks to shoppers drugmart and walmart and return them for 10 bucks each, he just says he bought the wrong colour. He only gets store credit at walmart but shoppers just gives him his cash back.
There is a show on TLC called extreme cheapskates it starts this week sometimes. Last season they had a family who saved on toilet paper by using face clothes,and they would just throw them in a bucket and wash them daily. Another guy would just ride around town on his bike and try to find loose change by vending machines, laundry machines, booths in restaurants, payphones.