Hello. I know nothing about platinum, and do not currently own any. Gold and silver are highly liquid, i.e. I can be on the corner of Collins and Swanston Sts in Melbourne and within minutes I can sell all my gold and silver bullion. Is platinum (AU coins) as easy to sell as gold and silver? And does it revolve around SPOT? If I had a few coins can I dispose of them as easily as I can dispose of gold and silver? Where could I sell a 1 oz coin easily and quickly for spot price in Melbourne? Many thanks in anticipation of being enlightened!