how do I stop all the pop up ads?

[lobsterhunter01]

having to X out adds is getting very annoying!!

[pjcdn2005]

ebay doesn't normally have pop up ads so it is likely some type of malware that was picked up on your browser. A few things to try...

Clear your browser history and cache

Do a virus scan

Do a malware scan with a product such as malwarebytes

One of the users here often recommends a program called CCleaner