because of the rarity of this gun
a french Ideal double in 12 ga for sale in denmark http://www.lauritz.com/en/auction/french-ideal-sporting-gun-calibre-12/i3425099/

Description:
French Ideal sporting gun, calibre 12, number 2 of a pair, serial number, 20819, 74 cm clean barrels with loose action, 36 cm, stock with roll strap and repairs, leather case with accessories, hunting licence required.