The list was put together by a couple of collectors around the world. The prices are actual prices the collectors have seen or paid and should only be used as indicator of the market price. Prices tend to be lower in the country of origin and higher at globally known stores (eg. popular Internet stores). Because a dealer has one price set for an item doesn't mean the item will be sold...
Download the file for free. You can get it as a .TXT file. It can be given, shared, used in any form, as long as it is unchanged.
If you want to make an addition to the guide, mail me or one of the other guys that have been working on the guide, here are the links to those guys
NewOrder : The pop group with a dark past
Vince's NewOrder page.