We know that a portion of you customers will abandon because they are simply not ready to purchase right away - perhaps they want to comparison shop, they need to discuss with a spouse, they are waiting for a paycheck or just a rainy day. The comparison shoppers and "rainy days" are the ones you want to win over with urgency.
CompUSA shows a large callout with "You saved $119.00 today. Check out now before these deals expire!"
It also includes what could be a subliminal message. Did you catch it? "Order today. Ships today." (This would be an interesting test!)
Overstock highlights sellout risk:
This makes the shopper think about how much they really want the item, as it may not be available tomorrow.
Any other ideas of how to create a sense of urgency in the cart?