I am new to the coin hunting, collecting hobby and I purchased a few lots of coins online and came across a very old very good condition liberty nickels. Value is somewhere around 20-30 bucks not too much but I really like the detail of the coin. I will try and post a picture once I am home but what I would like to know if how do I keep it from rusting or being damaged by the environment-including the crud that is already on it. I dont know if just by putting it in a airtight container or a vinyl sleeve is enough to keep it looking the same.