Whenever a new collector delves into ancient coins, Roman, Greek, or other, the topic is uncleaned coins is likely to arise. Online auctions are full of uncleaned lots, some promising the lure of silver and even gold. Many dealers carry uncleaned coins and bulk lots show up in high end auctions. As with anything in coin collecting caveat emptor.
One of the lures, one used by many advertisters, is that in uncleaned lots one can find rare and valuable coins for minimal expenditure. While it is not impossible to find valuable coins, the odds as in Las Vegas are against the consumer. Coins can be broken, unidentifiable slugs, or barely identifiable but uncollectable slabs of metal. Many also are quite common types, types one could purchase for a few dollars. When one considers the investment in time, a profit is arre.
However, there is a very positive aspect in buying uncleaned ancient coins: Fun! If you like the cleaning, the discovery, the thrill of attribution, the experience could prove extremely rewarding. If you have the urge, find a reputable dealer (the online auctions are a gamble within a gamble) and see if you like the experience. For $10 or $20 a single foray is certain not to bring financial ruin.
To see some pics of coins being cleaned and mangled go to
http://www.ancientcoinvalues.com/39.html
Click on the uncleaned bronzes link. The last one seems like it will end up with the most improvement.

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