Amazon announced on Thursday that 2013 was a record-setting year for Amazon Marketplace sellers, and that it now has over 2 million of them. Throughout the year, sellers sold over a billion units worldwide, worth tens of billions of dollars, the company says.

Marketplace sellers had a particularly good holiday season with over 13 million units ordered worldwide on Cyber Monday, up 50% year over year.

If you’ll recall, Amazon gave Marketplace sellers access to high-traffic holiday deal pages, which no doubt contributed significantly to the big year.

“Amazon gave us an opportunity to offer an incredible holiday deal on Cyber Monday and we hit it out of the park,” said Eli Silver Sakkal, president of Amazing Deals Online. “We experienced an unprecedented 5,000 percent sales growth spike on an item we listed with an attractive holiday deal price. I know it sounds unbelievable, but it’s true! We sold more than $1,000,000 in product in a single day. Being a Marketplace Seller on Amazon has allowed us to benefit from the technical infrastructure they’ve built up over the years while reaching millions of loyal customers worldwide for a modest cost to us. We have enjoyed an 80 percent increase in units sold on Amazon this holiday season without having to invest a penny in our own infrastructure. Amazon by far has been our most successful sales channel this holiday selling season.”

Amazon says Marketplace sellers have continued “rapid adoption” of Fulfillment by Amazon with the number of active sellers using it growing over 65% year over year.

Peter Faricy, VP for Amazon Marketplace, said, “It has been an incredible year for Marketplace Sellers including popular brands and businesses of all sizes selling on Amazon. Our customers have told us they appreciate the hundreds of millions of products listed by Marketplace Sellers that range from all types of apparel to a vast selection of electronics items.”

“Our goal every day is to make selling on Amazon as easy as possible,” he added. “Fulfillment by Amazon is a wonderful service as it gives all Marketplace Sellers the option of warehousing their inventory in our fulfillment center network. It has been a game changer for sellers because their items become eligible for Prime benefits, which drives their sales and benefits consumers with additional Prime selection.”

Fulfillment By Amazon shipped more units in the Q4 than the total number of units combined in all of 2009 and 2010.

The number of businesses using Amazon Payments also grew by 50% year over year on Cyber Monday.

Image via Amazon Marketplace