One of the problem I face with Amazon in some other country is that they drop price of the product after I've already made a purchase and price difference is often $10 on $40 item.

I am forced to return the item and cause Amazon so much loss, when Amazon can just offer price matching upto a week but no they don't do that

Second, Amazon tells me that there is lightening offer on some product but the price has only changed like 1% and Amazon compares it with the fake price which it never before charged in its store.