Yes, although it doesn't fire the .50 BMG cartridge you might be thinking of... the Smith & Wesson 500X series revolvers can fire the .500 S&W Special or the .500 S&W Magnum cartridges; a number of Webley RIC revolvers were chambered for the .500 Tranter cartridge; the .500 Linebaugh cartridge is fired by converted .45 Long Colt revolvers; the .500 Wyoming Express is used by the Freedom Arms Model 83 revolver; the .500 Maximum is a variant of the .500 Linebaugh and is used exclusively in revolvers; the Freedom Arms Model 555 is a revolver chambered in .50 Action Express (same cartridge used in the Desert Eagle 50AE)
25-50
50-200 or so
50-100 or so
50-75 or so
25-50 USD
50-500 usd
50-200 USD depending on condition
50-110
50 or so
No more than 50 USD, and for that it would have to be NIB.
50 yrs old
No more than 50 USD if new in the box.