Business card as personal invitation

Many people have asked me if handing out business cards are worth it. I think that depends on what you consider worth it. If I was a "full-time" artist (unfortunately my computer knowledge pays the bills), then I would feel I needed to get my name out there as much as possible. I've had dozens of business cards, personally and professionally, and my experience is that about 1 in 100 people ever use the information on the card to contact you. I think that is worth it - especially since I print my own business cards and the cost is about 2 cents a piece. Usually, the contacts are wanting a piece of art they were undecided about at a show. Any sale helps. I think everyone should have at least one business card. You never know when people might decide they want what you're selling.