Crazy idea… hear me out for a minute…
There's 2 million purple $2 coins in circulation (60th Anniversary of the Coronation of Her Majesty Queen Elizabeth II)
They're generally selling for over $7 on eBay
687,700,000 $2 coins have been minted between 1998-2010.
So here's the crazy plan… order something like $2,000 worth of $2 coins from your bank. By my calculation, there's a 0.29% chance that each $2 coin is a purple one using the above numbers. So ordering 1,000 coins might score you with 2.9 purple coins. Drop 0.9 to adjust for the coins minted after 2010 not yet referenced in Wikipedia. Drop another 1 to account for crazy tax. Which leaves you a reasonable chance 1 of your 1,000 coins will be a purple one worth over $7.
$5 profit for only $2,000 outlay! Don't forget to return the reject $2 coins back to your bank so as to not lose out on your daily interest.
See, I told you it was a crazy idea.
:-P
My favorite way of getting rich:)