5. Perfume Bottles
There are auctions devoted just to perfume bottles, and if you or your mother loved collecting the pretty bottles on your vanity, you could be sitting on something special. 

Perfumers used to use important glass-makers to create their products, so that in itself could make your collection valuable. Or you can have a limited-edition bottle from a vintage brand, which can make waves in the auction world. If you think you might have something worthwhile, check out the International Perfume Bottle Association.