where do i go to look at old coins?
363801
Museums and coin dealerships.
469723
The 1990 $100 is only worth $100 but the penny should be worth a lot. Go to a coin dealer and have it appraised
771173
look in your local yellowpages for coin collector exchange shops
241359
Definetly on Ebay.com.  The Royal Mint, a link in the second answer, has realllly high prices so I would avoid them.  \n\nGood luck.
572841
Check a coin book. It will tell you what its "worth", then, when you take it to a coin dealer, he will give you "half as much", (he has to make a profit)...\n\nSo I would put it on ebay, once you find out what its worth, if you want to sell it, and put a minumum bid on it. That way, you will 'KNOW' that your going to get what you really want...\n\nAmmendment, I am guessing its an indian head penny, and they arent worth too much, maybe a few bucks at the most...\n\n\nI wish you well...\n\nJesse
672164
Depending on whether or not they are uncirculated, proof, or regular circulated coins.  Check out:\n\n\nhttp://www.pcgs.com/prices/\nhttp://www.numismedia.com/fmv/fmv.shtml
1085726
Check eBay.  Lots of coins bought/sold there.
337437
http://www.oldcoinshop.com/
100541
Yes, campaign coins are indeed collectable. If you go to ebay and type in "campaign coins" that should give you an idea as to worth and then search for coin collectors in your area.
187532
I recommend the Professional Coin Grading Service. They give good information on how coins are graded, how to work out which coin you have, as well as prices (updated daily). Good luck!
50207
Do you have a photo? You also may want to connect with a coin dealer for more accurate information.
294775
eBay would be the 1st place to check.\nYou never know what they will have.
350616
Need to know what country it is from, and the condition.\nIn the United States, for example, there were 3 areas that made the 1913 penny.  In Canada, maybe 2 (not sure).  Also Great Britain.  \n\nIf it were a US coin, the BOOK Value would likely be anywhere between 65 cents and $33 (dollars)  depending upon \n1) where made in US  (Look for a small letter under date) \n2) condition\n\nBefore giving a value, MUST  know what country.\n\nIn Large libraries (Ususally MAIN  library)  they MAY  have a very thick directory, which has pictures of the common insignias on most major countries' coins, so  yuo could at least START  there.\n\nForeign coins are harder to sell, and ALL have a DEALER value of 1/3 to 1/10th (or less) the value stated in any coin directory.
84403
Don't clean them, this will void them of any value. Believe it or not, old, dirty coins are worth a lot of money!\n\nAlso don't handle them a lot, the oils from your hands will get them more, for lack of a better word, "corroded". Put them in acid free protectors.
1039556
A coin shop.  Look in your phone book.  Most cities have them.  Also, check your local paper's classifieds.  Sometimes people advertise in there that would like to buy coins.  You can also try and sell them on Ebay.
295775
1) Go to a library with a good periodical collection and look at old advertisements.\n\n2) Or research the historical rates of inflation and work backward from todays prices.\n\n3) Go to nearby "adult" community and ask for the oldest person with the best memory.\n\nDont ask my grandfather..according to him everything only cost a nickel.
109340
These websites should help\n\nhttp://coins.heritagegalleries.com/info/typevalues.php \n\nhttp://en.wikipedia.org/wiki/Kennedy_Half_Dollar\n\nhttp://coincollector.org/vault/coin.html?cat=5&id=74\n\nwww.pcgs.com/prices/frame.chtml?type=date&filename=kennedy_half_mod\n\nThis website will tell you the mintage of the coin\nwww.coinfacts.com/half_dollars/kennedy_half_dollars/kennedy_half_dollars.html