Listing on eBay is generally a breeze until you want to maximise your sales by cross selling. I recently spoke to a snorkel and swim company who manually adds up to 50 cross-sells per listing before he posts. On average it took him over 1 hr per listing. He understand the benefits as it increased his sales by 30% - so we are helping him to do this automatically.
www.Ad-Lister.co.uk lets you do this in seconds. You can select the links of live listings before posting your products to eBay.