RP from 06: FYI on the New Wedding Stamps from the Post office

They come in a set, you get 20 purple (38 cents) and 20 green (63 cents) together. Now you can buy the purple ones alone but to get the green one alone they are not offering them for another few weeks, so if you happen to have already purchased your stamps for your RSVP, like I did you will be stuck with extra stamps, but I figured I'd save them for my Thank you cards.