LOS ANGELES (CBSLA) — This Cyber Monday could be one for the record books.

The National Retail Federation says 164 million Americans are shopping this weekend — with almost half purchasing something on Cyber Monday.

READ MORE: 67-Year-Old Linda Marie Cross, Of Torrance, Missing For Nearly 1 Week

CBS2/KCAL9’s Joy Benedict reports Cyber Monday was the biggest day in e-commerce history last year. This year, websites are expected to bring in about $3.8 billion in sales, with a third of the sales being made on mobile devices and more shoppers leaving brick-and-mortar stores behind.

READ MORE: Man Taken Into Custody Following Hours-Long Standoff At Montebello Apartment Complex

Retail experts say laptops are expected to be a hot item online, as are shoes. Toy prices are expected to drop 19 percent.

MORE NEWS: Several Detained After Off-Duty Deputy's Vehicle Struck By Pellet Gun In Canyon Country

If you miss out on the fanfare you may not be completely out of luck. Many sites are expected to offer a week full of deals.