If you add up what the average female spends a year on makeup, hair/ beauty appointments, new shoes,clothes, $15 bottles of shampoo, handbags etc, compared to us blokes then I'm sure it would be in the Thousands, so going by that I reckon buying 1 pin a year( which will hold value pretty much in case you need to sell it) will still fall short of the amount they spend.
All good points Chris - duly noted
