Obsessive Ebay Disorder - You keep buying stuff on Ebay even though you don't need it

You keep buying stuff on Ebay even though you don't need it and it's making your life worse.

I have 100 pens. I don't use any of them. I just buy them because they look cool.

I bought a whole set of tiny plates. They’re not even for eating.

I bought a box of 100 rubber ducks. I have no idea why.