What are you actually comparing?
Calculate break-even using the full invoice instead of one per-ounce discount. For this decision, put smaller order at standard shipping alongside larger order at discounted premium and start by asking whether both quotes represent the same fine metal content, metal type, fineness and destination.
The quantity tier may save a fixed amount per ounce while additional fees rise with weight or value. A larger order is economical only if savings exceed incremental costs and the added quantity is actually wanted.
The cost model
The comparable delivered cost is the quoted metal subtotal plus shipping, insurance, any payment-method charges and applicable sales tax. If the two offers have different fine-metal weights, divide each full delivered total by fine troy ounces before comparing the cost per ounce.
Premium per fine ounce = (delivered total ÷ fine ounces) − the corresponding spot price per ounce. Percentage premium = (premium per ounce ÷ spot) × 100. This is a cost metric, not a projection of investment returns.
How to check this purchase
Compare total cost for each intended order size; if buying more is required for the discount, consider opportunity cost rather than treating the extra purchase as free.
- Choose a precise product specification and intended quantity.
- Obtain current listings or written quotes from dealers at the same time.
- Use the same payment method and delivery location wherever possible.
- Run both totals through the delivered-cost calculator.
- Review fulfillment, authentication, refunds and realistic resale channels before paying.
Risks that the lowest price cannot capture
Counterfeit exposure, delivery delays, shipment loss procedures, liquidity and a seller’s actual buyback spread are not reducible to a single premium percentage. Larger purchases can require non-standard fulfillment or more documentation. Ask the seller for clear written terms; never treat an “as low as” badge as a binding quote.
Where to go next
Explore the cost buying desk for related information, or open the dealer comparison to review the four merchants currently covered. Actual availability and pricing are controlled by the merchants, not by this publication.