Never, let me repeat a little louder, NEVER buy gold or silver without taking delivery.
The cost of having and storing silver and gold is of relative unimportance compared to the worth of having it. Gold and Silver should not be considered as investments. Gold and silver of course are investments to many people and some see that as their only value but the value of precious metals is having them in times of calamity.
Through out the history of civilization men have been willing to do most anything to own gold and even silver.
There is little physical gold in the world and it does not have an enormous industrial value. Silver on the other hand is more plentiful but the demand outstrips production. Hoarded silver is being sold to industry. When the hoarders no longer are willing to sell the price will go up.
The value of Silver and Gold do not really change much over time. In 1962 you could by a gallon of gasoline for about $.20. Those same two dimes today will still buy about a gallon of gas, that is 1962 dimes, they were 90% silver.
Precious metals are not really money but are simply a store of wealth, although they have been used as money and can be coined and become true money. Get all you can, now is a very good time to do it.