I have a selection of gold sovereigns 1880-1925 and perth mint released coins and sets from 1985-2000 and some olympic 1 oz gold coins etc.
I asked a reputable sydney coin dealer the value of a millenium olympic set purchased in 2000 for $6500,the value ...the answer>>>>>>only worth wait in gold. Last set he couldnt even sell it, melted it down for gold content. answer: buy bullion without the mark-up for coins.. good luck!!!