Starting Jan 1, 2012, all PM transactions over $600 will require a 1099 report.
http://www.americanfederal.com/2010/06/rare-coin-reporting-legislation-passes/
Today's gold to silver ratio is 67. You can change up to 8 ozt of gold into about 500 ozt of silver without drawing attention at the $10,000 radar level in effect today. Silver should be in more demand next year or two and the gold/silver ratio drop next year (silver price up more than gold prices) because you and others will want to buy and sell at under the $600 level per transaction.
It is possible that even the 0.25 ozt GAE might be over $600 in 2012. While the 1 ozt SAE will still be under $50. Even your local coin dealer will appreciate your under $600 transactions so he does not have to fill out the paper work.