I don't plan to sell my collection in my lifetime. My collection isn't on the same level as Mitch's, but I wouldn't sell it if were.
-
Some deals are already starting to show up, so it's a good time to buy want-list items that are hard to find. For anything that isn't hard to find, it makes sense to wait.
-
I take Mitch's advice to be directed at those who have always planned to sell some items eventually—better to sell now than a year from now. (It might have been best to sell a few months ago, but that ship has sailed.) It doesn't really apply to those of us who expect to die with our collections more or less intact.