Rarity & Frequency Definitions

Uncommon: Not for sale or trade very often but copies are circulating enough that it's not rare. Or it is a series not released in the United States and only accessible in other countries.

Common: For sale or trade very often.

Rare: Sometimes for sale or trade, but there might not be plentiful copies circulating either.

Ultra Rare: Almost never for sale or trade and might have a very limited number of copies circulating.

Infrequent: Scarcely for sale or trade.

Somewhat frequent: For sale or trade enough times that it's no longer infrequent.

Frequent: For sale or trade often.

Very frequent: For sale or trade very often.