Excuse me if i`m a bit slow, and you all probably know about it, but I stumbled across a link in the software forum for a site that finds the lowest price dvd`s from regions 1,2,3 & 4.
It searches through dozens of supliers (many of which have been recommended on this forum), converts all the currency`s and works out the delivery cost and then list`s them in price order. saves bucket loads of time and money, try it before you make anymore purchases.
http://www.dvdpricecheck.co.uk/