Amazon appears to have changed its rules regarding its famous 20% off discount for Amazon Prime pre-orders. It looks like the terms and conditions for the program has changed to no longer include re-releases and re-masters, so if you were thinking about using it to get some cash off Shenmue 1 & 2 or anything []
Source: N4G PC Amazon Prime No Longer Offers 20 Percent Discount on Re-Releases and Remasters