Usually this brush retails on the Real Techniques website for $8USD. In Priceline in Australia - $17AUD. And how much did I pay for the exact same product on eBay? $2.42. Just do a quick wash before you use it and it's perfect, it even has the real techniques details on the handle. *The seller I bought this off does not sell it anymore, I found another seller linked above*

Nose Rings 
Probably not the best thing to buy online, especially eBay. I clean them before I wear them and I haven't had a reaction or anything. And 1 dollar! 

Cleansing Silicone Pad
I bought two when I first purchased these - one for my face and another to wash my brushes. And it does an amazing job at both and they are very easy to wash.