That depends on where your purchase will be delivered or stored.
Metals purchased in one region can only be stored in that region; however you can take delivery from any region with minimal restrictions.
During the ordering process, you can review current prices for all regions side by side, to help you find the best combination of price and storage location.
Those prices are sourced from multiple wholesale dealers or refiners who operate or stock material in that local region (the names of these suppliers are not shown for competitive reasons), and the price shown is the average of those current prices. When you place an order, you will be given a final confirmation with the best local prices for your selection before confirming your order.