Recommendations about Amazon?

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Hi guys. For almost 1 year Amazon arrived in Italy. I could already see that its prices are unbeatable on most books.I have twi blog on which I talk about poetry, theater and I write book reviews. I'm affiliated with several online bookstores, but now that Amazon has come I'm tempted to change affiliaton because the prices are really unbeatable. what do you recommend? Keep all my affiliation and use a solution of a pricing compared to give importance to the best price or take exclusive affiliation with Amazon? Is there any affiliate here that uses it for a long time? You will know advise me?