If you are going to sell a raw, valuable coin on Ebay: SELL IT LIKE THIS.

WHAT NOT TO DO: Do not just put the coin on a table and take a picture. this will not make buyers buy your coin.
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SELL IT LIKE THIS: buy a case or capsule, put the coin in it, have great lighting while taking pictures. Putting the coin in a case will make people know that your not just touching the coin and getting fingerprints all over it and they will buy it.