Steve Jobs might have been recognized tech visionary, but he was decidedly old-school when it came to business cards, preferring run-of-the mill, paper ones for his personal use.

Now, three of his professional calling cards are being auctioned off for a private school fundraiser.

The business cards date back from 1984 to 1990, and track Jobs' tenures as Apple Chairman, NEXT President and Pixar Chairman of the Board.

Bidding opened at $600 and by Friday, reached $2,405 for the trifecta.

The auction, being held by The Marin School of San Rafael, California, continues through May 7.

Credit: Marin School of Northern California