On eBay's 1099-K, eBay reports Gross Receipts, which is the total amount of money you receive from customers.
eBay's 1099-K does not include credits, discounts, refunds, adjustable amounts, sales tax, or fees.
In other words, eBay's 1099-K includes only the sale price and the shipping income you receive from the customer.
On the Accounts and taxes page, the sale price is listed as Gross Sales Revenue and the shipping income is listed as Sale Shipping Revenue.
For more information about eBay's 1099-K, see these articles from eBay: