Here are some examples using the ASK price listed on each site.
Perth Mint
Silver spot AUD = $26.38
One ounce kookaburra AUD = $36.38
Premium = 38%
Kitco
Silver Spot USD = $25.56
One ounce maple USD = $28.31
Premium = 10%
American Silver Eagles
Silver Spot USD = $25.51
One ounce Silver Eagle USD = $29.64
Premium = 16%
Perth mint coins seem very expensive. Is this gouging?