Well this is something you don't see everyday. Violet Tchalakov and Mike James, otherwise known as PRINTandGRAIN on Etsy, has created a very good use for those old Atari 2600 cartridges you probably have laying around.
They have turned them into business card holders!
Show off your love for retro gaming and pick up one for yourself $75.00! Yea, I know, the price may be a little steep for a business card hold. But there is a lot of customization that goes into these.
You can name your favorite Atari game, then they will use that game along with your information to design the holder's cover. On top of that, each holder is heavily modified to keep your business cards inside without falling out. So for this piece of personalization, it seems worth it to me.
What was your favorite Atari game from back in the day?