I have just learned something the HARD way!
All of my listings contained several links - to my About Me page, to Join eBid, and to my ONE store.
I later opened another store, and in doing so, changed the registered name (slightly) of the original store, so as to distinguish them from each other.
Hey Presto! - my 'Link to my Store' in ALL my listings, did not work - I had forgotten to change the original link to the newly named store link .
Going through every one of my auctions then running (and there were only about 90 of them) and changing the links took a long time ...
... So (especially to those new to listing) a word from the wise (after the event) - ensure that you are happy about ALL aspects of your listings defaults before you commit them, as once your listings are up and running, it will take a lot of work to amend any links within them that are no longer valid.
I should have thought it through BEFORE I opened a second store, but being dumb and stupid I rushed to create the new store, and rename the old one, without considering the consequences. I admit it! Also, this scenario applies to links within your About Me page AND in your Signature Link on the Forums ... so please be warned . Buyers are very likely to be put off if they click on one of your links that goes ... nowhere!