Handguns: These sidearms lack the range, power and rate-of-fire of the rifles and shotguns, and should be used as a last resort (with the possible exception of the much more powerful higher-end pistols). They do, however, have an extremely short reload time - you can reload them and fire in the same turn.
Remington Model 1858 - $50 (6 rounds)
Colt Army Model 1860 - $75 (6 rounds)
Smith & Wesson Model 3 - $100 (6 rounds)
Colt Single Action Army - $150
Colt M1877 Double Action - $200
LeMat Revolver - $350
Bolt-action rifles: While more powerful and accurate than repeating rifles, bolt-action rifles have been forced to pay with a lower rate-of-fire and higher reloading time (2 turns). Higher-end rifles have a higher rate of fire and lower reloading time.
Dreyse needle gun - $125 (single-shot)
Berdan II rifle - $250 (single-shot)
Springfield M1873 rifle - $350 (single-shot)
Lebel M1886 rifle - $450 (8 round mag., 1 turn reload time)
Lee-Metford rifle - $600 (10 round mag., 1 turn reload time)
Gewehr 1888 rifle - $750 (5 round mag., 0 turn reload time)
Repeating rifles: Less powerful and accurate than bolt-action rifles, repeaters make up for these shortcomings with a higher rate-of-fire and shorter reload time (1 turn only). Higher-end rifles generally have smaller magazines, but more power and accuracy.
Volcanic rifle - $125 (20 round mag.)
Henry repeating rifle - $250 (16 round mag.)
Spencer repeating rifle - $350 (7 round mag.)
Winchester M1873 repeating rifle - $500 (15 round mag., 0 turn reloading time)
Winchester M1876 repeating rifle - $650 (15 round mag.)
Winchester M1886 repeating rifle - $750 (15 round mag., 2 turns reloading time)
Shotgun: These powerful guns can kill pretty much anything at close range, but are inaccurate at longer ranges. They reload rather slowly as well, at a pace of two turns.
Sawn-off shotgun - $150 (2 rounds)
Coach gun - $300 (2 rounds)
Winchester M1887/1901 repeating shotgun - $500 (5 rounds/mag.)
Bows: While rendered obsolete by the appearance of accurate repeating firearms, bows are still useful as long-distance sniping weapons when you don't have a bolt-action rifle handy, and in the hands of a competent horseman can still prove to be a devastating weapon on the open plains and deserts of the Wild West.
Composite bow - $150
Longbow - $200 (cannot be used from horseback)
Hand weapons: These are your true last resort weapons, when you don't have even a pistol at hand. Pocket knives, shortswords and tomahawks can be thrown at your opponents.
Pocket knife - $25
Shortsword - $35
Bayonet - $60 (Note: Can be attached to rifles)
Tomahawk - $70 (Note: Effective both when thrown & used in close combat)
Cutlass - $100
Sabre - $150
Lance - $225
Mounts: These mounts differ in ability - ponies are the weak starting horse, mules can take and dish out considerable amounts of punishment but are slower than other horses, Quarter Horses are fairly balanced but capable of great speed at short distances, Mustangs are also balanced horses with a stronger emphasis on weight and power, Standardbreds are true 'jack-of-all-trades but master-of-none' horses, and Thoroughbreds are built for speed.
Pony - $250
Mule - $350
Quarter horse - $500
Mustang - $650
Standardbred - $750
Thoroughbred - $1,200
Ammunition: For the sake of simplicity, we will be using universal ammo in this game - I'll always automatically assume you've bought the right type of ammunition for your weapon.
Ammo Pack - $10, 30 rounds or arrows/pack
Explosives: The good stuff
Explosives are useful for wiping out large concentrations of enemies, but (especially in the case of dynamite) they can explode in your face if struck before you're ready to throw them. You can throw one explosive per turn.
Ketchum hand grenades - $80 (three grenades)
Dynamite Charge - $100 (one charge)
Large bag of dynamite - $200 (two charges)
Massive bag of dynamite - $300 (five charges)