I have ordered from probikekit ... the prices are cheap because they specialize in older products, but they are all authentic. The service is good and the products are great. Shipping is a little unfortunate. Because they are based overseas, they ship a large number of products to their distribution offices in the US, then they ship out to the individual customers. This cuts down the shipping costs big time, but slows down the shipping process and so products take longer to get to you. They do have good e-mail updates and customer service if you have questions about your order though.