Here is an interesting looking rifle.

Model Name: HOLLAND & HOLLAND DBL RIFLE
Price : $16,500.00
Seller : MONTY WHITLEY
Contact : http://www.gunsamerica.com/guns/976816939.htm
Description:
HOLLAND & HOLLAND HAMMER DOUBLE RIFLE .500/450 CALIBER.
.500/ 450 caliber, 28" fluid steel barrels, Snap action
(semi-self closing) underlever with an extra hidden bite on the
rear lug. Back action locks with low profile hammers.
Cherckered splinter forend with Anson release, checkered pistol
grip buttstock with extened upper & lower tangs. Buttstock
measures: comb 1 5/8" heel 2 5/8" pull 14 1/2"
over a hard rubber pad. In spectacular condition retaining
all of the vivid casehardened finish, 98% barrel blue and
perfect bores. Lovely wood and very crisp checkering. Appears
little used. Serial range 148xx.

Click this link to contact seller:
http://www.gunsamerica.com/guns/976816939.htm
(There is a photo for the listing)