After you browsed through the real bookstores, where did you buy them?
I usually both browse and buy at real bookstores. In fact, I sometimes browse on Amazon (the ratings are very useful), then buy at the bookstore.
Why? Because even when the price difference is large, the absolute price is still quite low. Besides, these days the price difference often isn't actually very large anymore, once you add the cost of shipping. The difference may be that of a plain cup of coffee or less for a book I may spend weeks enjoying. And I can get the book right then, right there, not have to wait for shipping and schedule a pick-up time.
I work and I have disposable income. I don't, however, have a lot of free time. I can buy far more books than I will ever have time to read without making much of a dent in my personal play money. The limit is not money but time. Books I can't find elsewhere I order from Amazon or Rakuten, but otherwise I prefer the physical store.