My experience has been quite the opposite. Amazon's​ reliable and fast delivery alongwith its amazing customer service have been 2 key influencers in me spending 10,000s of dollars every year there. I have a habit to check Amazon first for any item I want to buy and if I can't find it there (or sellers who are part of Prime fulfillment), only then I venture out to another site or, most probably, buy it from a retail store.