For my particular situation, instore expensive cards in a penny sleeve and then in a top loader and then i have a clear plastic box made for storing top loaders upright. I then place this storage box in a lock box with those silica packets.
My question is, do you guys feel storing expensive cards in a penny sleeve and top loader is good enough? Or would it be a better idea to use a kmc perfect fit first then place that into a penny sleeve or standard sleeve and then in a top loader?
This thought came to me because i was thinking that the penny sleeve and top loader arrangement isnt air tight. Using a perfect fit and penny sleeve might be airtight but using a perfect fit and standard sleeve is definately airtight. And to me airtight would be the best case for longevity. Anyone have any thoughts or opinions on this?