What is the value of USD based on?

Is there a smith and Wesson 30-30 rifle? What is the militarys current sidearm? Want to know value of 1887 revolver with no hammer and safety on trigger? What is a lock on a muzzle loader? What is the value of browning 9mm mk 1? What is the value of a 12 gauge Paragon double barrel shotgun? What is the value of a salvage Stevens model 311 double barrel shotgun? Can you shoot plus p ammunition in a smith and Wesson m and p 45 caliber semi auto? What is the value of a Model 8 Daisy Bolt Action Long Rifle? Who is gampy? What is the difference between 32 caliber and 380 handgun? How old is a m 49 22 cal short long long rifle single shot lever action? What is the max effective range of the AT-4? How do you get a bullet out of you? When was a 38 colt detective special made with the serial? What is the value of a ruger automatic pistol with a 6 inch barrel? How big is A5 in centmetres? Is there way to find IN STOCK 22lr bullets ammo sold in local area with a search or a app? High standard 22cal 9 shot revolver mfg hamden conn model the marshall worth? Where to get the w-2's offline for Popeye's employees?