It's definitely pricy if you order one at a time, but if you want a run of business cards costs come down to a couple dollars each. Or you can just staple your existing business card to a $1 bill!
I found those prices in the 'how it works' page and nearly closed the tab without a second thought. You might want to give some prices for larger runs, or at the very least say somewhere that volume discounts are available. Now that I know that I wouldn't have to pay thousands of dollars for business cards, I'm more interested.
Even now, I'm skeptically thinking "'Larger runs' probably means at least a thousand... who has three grand to drop on cards?"