Poppin, the purveyor of fun, colorful office supplies had a terrific email recently. They offered to give away a notebook (one of their more popular products) if you spent $10. $10 is probably half of their average basket, and there are a ton of products on the site that cost $9 (so you’d have to pick up a few more things).
A little sneaky? Maybe. It was enough to make me spend $10.