Far Oer sheet with fish

The only thing you have to do is put a card in the mail to Collectworld with your name and other information for the databank there and you receive a nice sheet with fishstamps. You must take some action to get addresses from collectors. Like the sheet, thanks Collectword, but that will be all for me. Put a lot of € in such a collection , don't think so.  Receive a few on a real letter, would be great. Could put it in my fish stockbook (if its not to big for that) will start with that.