http://cgi.ebay.com/1994-GOLD-HAWAI...VQQcmdZViewItemQQ_trksidZp1638Q2em118Q2el1247 I know that the Royal Hawaiian Mint is a private striker. So this is abit perplexing. It's not a real "coin" per say in the monetary sense.
This "coin" is listed in the Krause Unusual World Coin catalog. All the TPG will slab certain "coins" listed in this catalog.
Nothing makes it 2x bullion value. But some people are crazy enough or unknowledgeable enough to pay it anyway just because it is in a slab.