What are you actually comparing?
Convert total weight to contained precious-metal weight correctly. For this decision, put .999 fine product alongside .9999 fine product and start by asking whether both quotes represent the same fine metal content, metal type, fineness and destination.
The purity difference is small but mathematically real. A 100 gross troy ounce bar at .999 contains 99.9 fine ounces; at .9999 it contains 99.99 fine ounces.
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
For exact premium comparisons, divide by fine ounces rather than product gross weight when fineness differs.
- 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 basics 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.