The only reason old things are expensieve is because of it's
antique value, not because of it's actual monetary value.
People will not give you double the price just because it's a 1
dollar version and the 50 cents cost 140USD, UNLESS the 1 dollar
version is nearly out of market and no one is selling already.
Don't sell la.. keep it, when have sons and daughters can pass
down LOL
I checked ebay, most of the ebayers are selling other later coins,
like from 1904 onwards to 1920s.
I only found 1 selling the 1903.
And I also learnt from a history site that the 1903 is the FIRST
release/issue!! 
