Hi,
Thing I can't understand is why products from the category "Ratgeber" are working.
I made a test with a product there ; and the price is right when I refresh the page.
Did you set something special for the products in the category "Bucher" ?
Would it be possible to have more details about the configuration of one product in that category ? (and maybe one product configuration from another category).
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.