How can I block a specific seller from showingg up when I am browsing for items to purchase?

[12avionics*]

I am trying to find a way to set up an automatic block for sellers that I do not want to do business in the future.  

If I have had a bad experience with a seller I would like to be able to simply block him from showing up when I am searching for something.  How can that be done?

Philmont94

[eburtonlab]

You can block a seller's items from appearing a search using keywords, but not if you are just browsing a category.

You can exclude sellers by username from a search using the Seller section of the Advanced Search page:

https://www.ebay.com/sch/ebayadvsearch?_sofindtype=0&_byseller=1#byseller

Be sure you are using the correct username, not the store name. If you bookmark or save the resulting search and use it as a starting point, you can continue to block that seller's item from appearing in further searches.