Im trying to list some stuff on ebay but when I try to sign in it just keeps going back to the sign in screen.
(and yes, the username/password are correct)
Any ideas?

Stick your username and password up here and I’ll give it a go for you, sometimes it’ll work fine from another computer…

try clearing your browsing history, especially cookies.

First I’d check it wasn’t a phish link. Then try explorer assuming you are trying firefox.

I’m using safari if that affects anything?

If your on a mac, click on safari at the top of the tool bar and restart safari and click reset