I have some business cards that are so valuable, I can't give them away.

I was attending a conference with some vendor booths, and while it wasn't anything like a job fair, I thought I'd try my luck at pitching myself as a prospective hire. So I went to the most IT-oriented vendor that I could find, introduced myself, and proudly presented my solid plastic CompTIA A+ certification.

The good fellow thanked me and promptly pocketed it! It all went downhill from there as I had to explain that was a credential and not a calling-card, so I got it back, and definitely didn't get hired for anything!