My neice found a quarter with heads on each side.  What is it worth?
95546
It may not be worth much, if it's one of those coins sold by a novelty store or magic shop.  Look at it closely and make sure it's a real quarter...
393786
If it's a proof, or in mint condition, or is a "mistake" (ie, double-struck, half-struck, etc) then it would be valuable.  If its a regular circulated coin its only going to be worth face value.  To be sure, try taking it to a coin collector/dealer and asking them to tell you what its worth.  Or find a pricing guide in your local library (the official pricing guide is called a red book).
349840
If it's creased, it might be worth a little more than $1 but not all that much though. Crisp and new, it's worth more. Does it have "In God we Trust" on the back?  Doesn't change the value, but it's interesting.  Look on Ebay and see what they're going for.
422782
Many things were changed on the 1950 $10 bill, so it is probably worth more than $10.  You need to check with a coin dealer as the condition of the bill is also very important.  Good luck!
23126
It depends on many things, such as what condition it is in, the grade, where it was minted, and stuff like that. I can't remember what it is, but there are websites that can help you find that info. Try doing a search for it.
309656
There has always been a market to mis-struck coins. There may be a local coin shop, that would be the best place to check.\nThose coins are also sold on www.ebay.com But you won't get the full value as you will sitting down with a real coin dealer.\nGOOD LUCK
1043041
look it up on coin price guide....but don't get all excited...even if almost uncirculated it wont be worth a lot...but ...keep it...to some collector you might get 50 cents or a dollar....when i was younger they were worth about a nickel each - but 1942 is not that rare...you  would get more if it were a s mint mark ...1942-S ...as there weren't as many of those...see price guide URL below
19758
It's "worth" whatever a person is willing to pay for it.  It's estimated current value is about $40, but again it all depends on what collectors are willing to pay.
1128414
It looks like you have a 1932 Five Lati Crown slver coin.\n\nBelow is a link to a coin dealer that was offering the same coin for between $23 and $42 US.  I don't jknow if those are current prices.\n\nWith all coins - the value of the coin is related to the condition / wear of the coin.
515245
i was going to tell you it is not worth much, but if it is really in mint condition, it may be worth a good deal, i have a few, but they are not anywhere near mint condition.\n\nGood Luck!
504366
This might give you an indication of its value:\nhttp://cgi.ebay.com/SIGNED-AUTOGRAPHED-MINDLESS-SELF-INDULGENCE-8X10-PHOTO_W0QQitemZ7619091836QQcategoryZ108727QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
308436
Depends on where it was minted and does it have any unusual things about it. It could be anywhere from just over $10 up into the thousands. Best thing is to get the red book of coins. That will tell you exactly what to look for and how much your coin is worth. Be careful taking it to a dealer of coins, they will lie to you every time, hoping you are willing to sell it and they can make big money off it (if it is one that is worth a lot of money). The library would have books about the value of coins. By the way. There were two kinds of sliver dollars in 1921, the morgan and the peace. Those are how they are known in the collector world. Also in the books about value of coins.
4233
notmuch.  usually, a bicentennial quarter is worth about a quarter.  in the book its like 75 cents.  if its got an S mintmark, maybe a dollar.  the halves are worth like 3 in the book, but market values are still a half dollar.  if you have alot, you can sell it as a big lot on ebay.  but you wont get much.  i am guessing through my experience.  if you have like 100 bicentennial halves, you would probably get about 53 buxx for it.  even though, if you use it, you would get your 50 buxx value, since its still a half dollar.
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.
589542
Your best bet is to find a coin dealer in your area.  You can check out approximate values by looking at what the coin and silver certifates are selling for on ebay, or at one of the online price guides.  Good luck!
858362
if you own a penny dated 2009 it could be a forgery-- then again it could be a defective die being used during the press cycle of both the obverse and reverse strike to the coin-- mint errors are in good demand and you should have it authenticated thru p.c.g.s. or a grading service to see if it is in deed an error--if it is authentic and a mint error it could be worth quite alot of money.i heard a few years back where a susan b anthony was found on a quarter planchet-- it was sold for several thousand dollars on an auction website-- the mint does make errors and cannot retrieve some coins sent into circulation because the person watching missed it-- you indeed have a coin thats interesting for sure-- if its real-- you may have a penny that will buy you a new car or something else-- go to a reliable coin dealer and have it checked out-- or have it authenticated thru the previous mentioned services-- good luck
289349
These are called 'Grease die errors'.  Grease got between the die and the coin and prevented some part of the design to be stamped on the coin.  This is very common in the Delaware coin, where it reads "THE FIRST STAT".  I have a two New Jersey coins with grease die errors, and they are worth between 25 cents and $5 each.  Search for them on ebay yourself.  There are always people trying to sell these things for hundreds of dollars, but no one bids on them.  The ones that sell all go for less than $5.