It looks to me that most people reckon a niche review site works well with Amazon and i can see that by providing great info on the product could sway the customer to go and buy the product.
But what about a 'best price' model with a shortened reviews. Surely if seo is done correctly the visitors would only reach your site once they had definitely reached the decision that they want to buy the product and now want to know where to buy?(your main battle being- when they want to buy and if they want to go offline and buy)
Would love to hear some advice from anyone who has gained success through these methods maybe even some limitations of the methods.