In addition, you are not allowed to promote your other listings in your description using brand names ...it is also considered key word spamming.

From the site map on what is key word spamming:

The inclusion of words that are used to promote the seller’s other eBay listings.

• Example not allowed:

  • "Please view my other eBay listings for Beanie Babies, vintage Barbie's, Rolex watches and Chanel scarves."