Hi the Diana model 5s don't seem to get very good money for what is a very good pre war pistol. l sold one in .177 at Melbourne airgun fair in 2017 for £65 in good condition. and one in the rare .22 very good bluing at the last Kempton fair for £80. the Haenel Mk11 l sold one for £45 in the same condition as yours about 4 years ago. l hope this helps.