I was just curious and checked the prices I paid for books. I bought the Twilight Saga in January 2010. It was $34.69 Canadian and I had a 20% off code. Now the same set of books is listed at $38.09 Canadian and this is well before the midnight price change.
I hate when people mark up prices and then announce a sale.
I have bought several books using the $2 off code though but still.....