Are 2 dollar bills rare

Uncommon, yes. Rare, no.

Millions have been printed in the current series since 1976 so any that you get from a bank are just spending money, that's all. They're uncommon because demand for them is low in most parts of the country, so they don't circulate all that much, and those millions of $2 notes are only a tiny fraction of the billions of other bills in circulation.

Answer

Some two dollar bills are rare, and some are not. Over 220,000,000 were printed in 2006. But there are many different types of two dollar bills, and some are quite rare. In order to know whether a given bill is rare, it would have to be completely identified. This can be done by a coin dealer.