Likely it has been reduced to just the bullion value of the coin, but that's about $800.00 as of today.
Current retail price is $312.00-$420.00 for circulated coins depending on grade.
As of 09/2008 its value ranges from $980 in worn condition to about $1100 if almost uncirculated.
Regardless of mint mark, retail values are in the $200 to $250 range depending on condition and the current price of gold.
Morgan dollars are silver, not gold.
Current retail value for a Liberty Head 1903 Double Eagle is $1,490.00 in the grade of MS-60
Assuming the coin is circulated and has no mintmarks, retail value is $28.00-$58.00 depending on how much wear the coin shows. The 1903 Morgan is a fairly common date.
Prices updated as of 09/2008 The 1903 O Liberty Head (Eagle on reverse side of coin), depending on what grade (shape) it's in, will range from $514.00 in Very Fine condition up to $600.00 in MS60. Information came from Numismedia.
The US only struck $50 gold coins as commemorative pieces, but the first ones were dated 1903. Please check again and post a new, separate question.
It is impossible to determine the value of a piece of art in this online format. Many factors determine the value of art. The best option is to have the piece appraised.
Current retail value would be $680.00-$720.00 depending on who give the coin that grade.
In circulated grades both coins have the same values of $312.00-$414.00 depending on grade. In uncirculated grades the 1900 is $444.00 & the 1903-S is $504.00
Franklin first appeared on the U.S. half dollar in 1948. A half dated 1903 is a Barber half. Values for an average circulated coin (G-4 to VF-20) with no mintmark, run from $17.00 to $45.00.