Depende muito de quem ta vendendu, mas costumam variar nessas faixas.

Leather helmet = 5-10gp
Chain Helmet = 10-20 gp
Studded helmet = 20-25 gp
Brass Helmet = 10-25 gp
Viking Helmet = 15-40 gp
Legion Helmet = 15-40 gp

Leather Armor = 10-20gp
Studded Armor = 15-35gp
Chain armor = 60-100gp

Leather legs = 5-10gp
Studded legs = 40-100gp

Leather boots = 5-10gp
Sandals = 10+gp

Wooden Shield = 7-15gp
Studded Shield = 15-25gp
Brass Shield = 30-50gp
Plate shield = 50-100gp
Copper Shield = 100-200gp

Mace = 30-70gp

Rapier = 10-15gp
Short sword = 15-20gp
Sabre = 15-20gp
Sword = 30-50 gp
Carlin sword = 35-60gp
Katana = 150-250gp

Hand Axe = 5-10gp
Axe = 10-15gp
Hatchet = 30-50gp

Silver Amulet = 200-250gp
Bronze amulet = 200gp

Bow = 100-400gp
Spear = 5gp cada
Snowball = 5gp cada
Arrow = 1gp cada
poison arrow = 1gp cada

Rope = 15-35gp
Shovel = 10gp
Fishing rod = 70-100gp
Backpack = 10gp
present box = 10-20gp

Qualquer tipo de comida o preço varia bastante, depende da situação.