Nov. 29 2011 08:40 PM

SmartMoney--Shoppers may have more incentive to buy online this year: the sales are as big as -- if not better than -- in-store offers and many retailers are offering free shipping. The catch, say experts: Shoppers have to spend a lot more. Some 93% of stores will offer a free shipping deal this year, up from 85% last year, according to the National Retail Federation arm's projections. But unlike last year, when many retailers offered free shipping on everything, regardless of the amount spent, this year consumers have to pay a minimum, says Luke Knowles, founder of free-shipping-focused deal site In the NRF's annual study of Cyber Monday offers, for example, 30% of sites said they'd offer free shipping on some orders. Last year, 22% offered it on all orders. Read more!