Seller Account ID

[tsaic0]

There's an account ID at the top-right of the Seller account page, but there's no way to view the entire number .

[mam98031]

If you have your account set up to be a selling account, your account ID is tsaic0

Can you give a bit more details on what number it is you are trying to see and where you are trying to see it.  On what Ebay screen?