i don't own any slabbed coins. i really just want one, just to have it. almost got a slabbed president dollar on ebay for $4 just to have one. o well sunday that shall change, when i get the two morgans i have been drooling at. later on i will get the privilege to have the problem of storing them when i acquire more then 2! i plan on getting the ngc boxes, when that happens...
I use the same method as sparrow although I have been told the silica desiccants are unnecessary if you store them in Intercept boxes. I keep one in there just in case.