Does anyone knows a good website to by books with a discounted price ?
Depends on what you mean by "discounted price". Are you referring to used books, or a discount on new books? Current best-sellers, or obscure or out-of-date books?
Generally, the place I start first is EBay. Tens of thousands of books are sold there, new or used, probably weekly. If you have the specific book title or author, that will be enough to check the availability, and bids on auction.
For those who don't want to go in a bidding war, I always can check listings for Amazon.com, which will list something like thousands of books available, often at a significant reduction in price. This can be significant savings in the case of new or recent bestsellers.
For used books, I also like Powell's Books, the largest used-book store in the US. I think they are located in Portland, Oregon, and they do lots of mailorders.
Another great source is abebooks.com , (as I remember, it stands for "American Bookseller's Exchange", which is a single website connecting thousands of small independent booksellers throughout the US with used books to sell. I have used them and found even obscure books available somewhere in the US, and able to be shipped to me in a matter of days. Most take credit cards as well as money orders, etc.
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