What's a clever incentive to mail to sales prospects?

My company wants to send something to potential customers. We want to spend between $10—$20 to send a couple hundred people something that puts a smile on their face. The people receiving the gift will be busy executives that works for large retail companies and ironically, their job is to manage large plastic gift card campaigns. The theme of our mailing is “what if you could…” and we’ll send them lots of different ideas they may not have thought of—creative ways to structure their gift card campaigns. Anyone have creative suggestions for what we could send them in the mail—along with our “pitch” letter?