I have 4 sets of 10 Response Envelopes still unopened from when I was planning my wedding a few years ago. The link to the product is here:
http://www.paper-source.com/cgi-bin/paper/color/4-bar-envelopes/2506.001/102.html and the color is Beet which is one of the purple/magenta colors. $5 and you can have them all. E-mail me at angel dot delarosa at gmail dot com if you are interested.