This is a major cute idea, do you have products hanging around that you barely touched or used a couple of times and want to get rid of ? If so take a look at this website. http://www.lolasgreenhair.com/
So what are you going to do with all of those moisturizers, shampoos, conditioners, gels and other random haircare products that you used a couple of times and then abandoned for the next hot product?
Sell them on Lola’s Green Hair! Let the next girl benefit from your product-junky-ism
ETA: It looks to be around .50cent to list an item once you create an account