Today’s online shoppers desire more instant gratification, hence the success of amazon prime.

In keeping up with amazon, ebay just announced a new program that will offer online shoppers guaranteed three-day delivery on 20 million eligible products — “millions” of which that will also include free shipping.

Guaranteed Delivery will roll out in the U.S. starting this summer.

Ebay says that if the guaranteed item arrives late, they will refund you the shipping cost, or, if it shipped for free, you will receive a coupon toward your next purchase. Ebay also will offer free returns on those late-to-arrive items, it says.

“While the majority of items on eBay already ship within 3 days or less, as well as for free, Guaranteed Delivery will give shoppers even faster delivery options and the confidence that their items will arrive on time,” said Hal Lawton, Senior Vice President of North America at eBay, in a statement about the new program.

You will be able to search and filter for items by 1- and 2-day deliveries, too.

eBay itself says a guaranteed delivery date is now the second most important criterion for online shoppers after free shipping.

Sellers are also being offered new shipping tools that will help them provide more accurate ship times and charges to buyers by region, as well as the flexibility to customize the days they work, and the cut-off times for same-day handling.The tools will be offered at no additional cost, but eBay says the sellers will have to meet a required set of shipping standards in order to participate in the new program. For those that do, however, there’s a chance to increase their sales, satisfy customers and attract repeated business.