If it has any circulation wear at all, it is worth about $4.50 now with silver trading for a little over $13 an ounce.
Paid $75 for this coin and expect to turn and sell it for $125+ 4/24/10
There was no Postal Commemorative Society in 1786
Current value is about $7
The only commemorative dollar struck that year honored the Marquis de Lafayette. Its retail value could range from $200 to $400 depending on condition.
The value of Los Angeles Olympics commemorative silver dollar varies and depends on the one you have. An estimate for most are 38 to 40 dollars.
$1, £0.62, €0.76.
The US didn't make any 1968 commemorative halves, only standard-issue Kennedy halves.
Lafayette commemorative halves were issued in 1900. The only commemorative half dollar with that dual date was struck to honor the battle of Lexington and Concord. Please see the Related Question for more information.
The only commemorative dollar struck that year is a 1983 Los Angeles Olympiad "Discus Thrower" coin. A proof "S" mintmark coin in the grade of PF-69 has a current market value of $35.00.
The 1986 Statue of Liberty Centennial half dollar is a copper-nickel clad coin. Current retail value is $4.00.
Retail values are about $10.00, the Melt Value is $9.46 as of today.
Current average retail value is $29.00
This is probably a commemorative coin issued by the US mint in 1986. If so, these one dollar commemorative coins usually weigh in at .95 OZ and are 90% silver. If so, this coin would carry a value of $9.33 melt currently.