vary between 10% and 20% above spot.
Seeing as they buy between 10% and 18% below it looks like they screw a big profit.
I bought bars from Bank of Bermuda, when I was working there, nearly 20 year ago. I cringed at paying spot + a couple percent. I think spot was $375 and I paid $385. Dollar was over 2 to the pound so they were £185 each. Now worth £700 each and I wish Id bought 40 and not 4. Of course I could only just scrape together the $$ for 4 back then