I have found out that on ebay are high-priced products from big fishes like Frank Kern, Tony Robbins or Brendon Burchard for very cheap price(copies on USB). I know I have to try a product before review. But I don't have many for those expensive products and possible income from affiliate is really high. Is it good idea or not? Especially is it possible to be an affiliate partner of those gurus if I don't buy a product from them?