Rembrandt Joint Issue with Germany

This stamps are in what we(our Post) call here "prestigebooklet". This booklet contains Dutch stams as wel a Germany stamp with the same picture as the Dutch stamp. The stamp is also availeble in Germany in MS of 10 pcs. Of course "(!?)!"there are a lot of differences between the stamps. There is , since the issue of 15-7-2006 which is sold out !!!) a lot of trade in this booklets. Postoffice price € 9,95 and now on Ebay from € 22.00 till € 55.00, see the link

http://cgi.ebay.nl/Rembrandt-prestigeboekje_W0QQitemZ120014563657QQihZ002QQcategoryZ128300QQssPageNameZWDVWQQrdZ1QQcmdZViewItem What do you think about these issue, it is not in the interest for the "normal" stampcollector. Prices are out of proportion I think. On a blogg site here there is a lot of spectulation for the price these booklets will do into one year. From € 200,00 till € 450.00 , where do we talking about !!!, just some printed paper........