how do you find a seller?

[glosha9]

Looking for a seller that sells Dell Computers

[eburtonlab]

If you search for dell computer you should see listings from many sellers.

If you are looking for one seller in particular, use what information you have to search for that seller's items.

[woodland_gnome]

What information about the seller do you have and what information about the seller are you looking for?

If you have his/her eBay username (e.g. mine is woodland_gnome) and are looking for his/her items currently for sale/auction, you can do an Advanced Search limited to his/her items, but I find it easier to just bring up anyone's list of active listings (e.g. click the "View listings" link next to your feedback score), edit the URL in the address bar of my browser to substitute the target seller's username for yours (or whoever's) and hit enter.