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Message:: [QUOTE="jaceravone, post: 251648, member: 9474"]Hello everyone, I have been reading this forum for some time, but just decided to join a few days ago because I have a bunch of questions that I need to get answered.  I have been collecting US mint commemorative coins since 1986 with the release of the Liberty set. Everytime a new proof set would come out, I would purchase it, with the exception of gold coins.  I was young then and couldn't afford the cost up until recently.  In the past 2 years, I have gone back and collected virtually every set, both proof and UNC that the mint has released.  I don't have everything yet, but I am working on it.  I keep all my coins in a climate controlled safe and take them out only every now and then.  Lately, I have noticed a lot of my coins are starting to tone or have specks appear on them.  Some even look like they have signs of corrosion! <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie104" alt=":yawn:" unselectable="on" unselectable="on" />  Here is the question that I would like to hear everyone's opinion on.....Do I send these coins in to be slabbed or do I keep them in their OGP?  Will slabbing help maintain the value or does it really matter?  Thanks for everyone's response - this is a great forum.Joe[PHP][/PHP][/QUOTE]