Just a heads up, Fable 3 is Free to download on the xbox live marketplace. I am not sure how long this will last for, so If you have not played the game yet I suggest giving it a go.
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It is still listed at full price on the website. However, If you purchase it with Microsoft Points, it will download for free. If you don't trust the site as it is listed with a price, download it from your console, as it is listed as free.

Edit:Changed the link to the correct one