The per ounce cost will generally go down as the amount of ounces purchased goes up. For example, a dealer currently has a 1 ounce platinum Valcambi bar selling for $1,533 and a 10 ounce varied brand platinum bar selling for $15,030. If you do the math, then the 10 ounce bar offers a savings of $30 per ounce. Click to Request Price.. "/>