Indeed difficult to find this product in supermarkets. The electric brush Oral-B Power Crossaction dating ten years, we do not find that last brush out products. They talk about sustainable development, but when it comes to finding spare brush refills or other, it's always a hassle. A fortiori when the product is aging. If Amazon had not been cataloged, it would have to throw the brush in the trash and buy another ... What economy? Moreover, the price was less than two euros on average compared to the traditional trade and free shipping, Why bother?