For gold coins I now buy semi-numismatic pre-1933 $20 Double Eagle coins in low grades such as AU (almost uncirculated) or jewelry grade. These semi-numismatic coins are a very thinly traded market (a market with a very small volume), and just a single investor trying to buy a few hundred of them can actually move the price of the whole market up. As of this writing their premiums are very small, but when investors rush in near the top of the market I expect the premiums to explode once again, returning gains not only on their gold content, but their collectible value as well.