That would be a Susan B. Anthony dollar and you can still get them at banks.
Can't find any reference to a piper dollar, there is a Pillar Dollar (1732 Spanish Dollar).
The US has NOT made a gold one dollar coin since 1889. The coin you have is a just a gold plated 1977 Eisenhower dollar that's only worth a dollar unless you find someone that wants it.
If the back of your coin has a picture of an eagle landing on the moon and a very severe-looking woman on the front, it's called a Susan B. Anthony dollar. All of the ones you'll find in change are worth just a dollar. Anthony dollars were issued for circulation in 1979, 1980, and 1999 but were failures because they were almost identical in size and color to a quarter, as you noted.
A Jefferson half dollar would be a real find, because Jefferson is on the nickel and JFK is on the half dollar. Regardless, a 1979 nickel is worth 5¢ and a 1979 half is worth exactly 10 times as much.
This is not a US coin, it's a "silver round". Most are made from .999 pure silver of different weights. Take it to a jeweler to find out how much it's worth.
i have a mewtwo & a Jiggalypuff .. did you find out how much they are worth ??
No. During 2008 the dollar has been worth very roughly £0.60 You can find exact daily figures by going to a site such as www.xe.com
Check Bloomberg's website to find your answer.
If you go to a Mint website, you will find the difference between Genuin & Replica. If your coin is Genuin, then is is worth about $1000.00 US dollars. If is a Replica, it is worth $1.00 US dollar.
It will be worth one dollar. The serial numbers really do not have an affect on value. There may be collectors that would find it of interest, but they are not likely to pay much for it.
Any you might find that were in circulation are still worth a dollar. The only ones worth more are the silver or proof coins, all minted in San Francisco.
Your state of Georgia hundred dollar bill could be worth 200,000 to 500,000 $ wow what a great find you have found!! Congratulations! I envy you to the utter most!