This article helps us understand the reasons for shortages, and high premiums:
FTA - "... This betrays a fundamental reality about the market for physical gold and silver bullion that many investors even regular buyers of bullion are not aware of. - There simply is not much supply available at any given time.
In other words, gold and silver products spend very little time sitting on the shelf waiting to get bought, making inventory very tight..."
http://www.gold-eagle.com/article/reality-available-gold-silver-bullion
FTA - "... This betrays a fundamental reality about the market for physical gold and silver bullion that many investors even regular buyers of bullion are not aware of. - There simply is not much supply available at any given time.
In other words, gold and silver products spend very little time sitting on the shelf waiting to get bought, making inventory very tight..."
http://www.gold-eagle.com/article/reality-available-gold-silver-bullion