Sorry, no - that is actually one of the 1001 deadly sins...
You are only able to link to other web pages if they contain further information about the product for sale, that for whatever reason can not be included in the description, and absolutely nothing is offered for sale on the linked website (from memory, the pages you link to can't even contain links to other websites where items are offered for sale, but I'm not abslolutely 100% on that).
Unless.... You're asking if you can advertise your eBay store on another site, then the answer is: more than likely. Some of eBay's content is restricted from use, but you can get codes for widgets that advertise eBay stores and listings.
