Insert a list of your running auctions, with photos, into your auction descriptions.
One of the ways to advertise your other auctions in any given auction description is to use a gallery — a scrolling viewport with thumbnail photos of all your running auctions — as described in [Hack #47]. Aside from the commercial versions, there’s a way to create a custom gallery using the eBay API.
First, include this code in your description:
<iframe src="http://www.ebayhacks.com/cgi-bin/gallery.pl" style="width:100%;margin:0;border:0;">