I don't remember seeing anything much lower than this: http://www.amazon.com/gp/product/B003274QH6/ref=s9_simh_bw_p74_d0_i1?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-5&pf_rd_r=1BHSA4R20AY2E22AYWHP&pf_rd_t=101&pf_rd_p=1261558182&pf_rd_i=193640011
The DVD version is $16.99.
Looks like the link in the OP is wrong. It's actually http://www.xbox.com/en-US/games/splash/f/fable3/ , and even clicking on the link there doesn't noticeably do anything to me. I don't get any sort of confirmations and it's just a page with an image and no content.