To put on auction at eBay.
"The collector decided to list his vintage watch on eBay so he could sell it through an auction."
In plain English: To ebay something means to sell it online through an auction site where people bid on how much they want to pay for it.
"I need to sell my old camera on eBay first before I can buy a new one."
A popular Internet auction website.
"She decided to sell her old camera on eBay because it is a popular Internet auction website where buyers bid against each other."
Ebay is short for Echo Bay Technology Group, the consulting firm that helped develop the company's early systems. While it might seem like a blend of "e-" and "bay," the name actually comes directly from this specific business entity rather than being constructed to mean an electronic marketplace.