This would be quite nice:

http://www.blocket.se/jonkoping/Best_Gun__Alexander_Henry__dubbelstudsare_35456429.htm?ca=3&w=3

"An English colonial gun by brand Alexander Henry, later acquired by Dickson. Double rifle in caliber .577/.500 The gun is in an incredibly fine condition with very good walnut. Probably never fired, the race looks brand new out! The gun is very nicely scroll engraved and has many fine details.
Price 65 000 SEK/10 000 US$ "