This is going to sound like an ancient gripe.
I get into countless situations (especially in larger companies) where the marketing organization is insulated from sales. It’s like the artists don’t hang with the jocks.
I usually urge the marketing folks to ask the sales people what the customers 1) need, 2) care about, 3) complain about, 4) respond to emotionally. The sales people know!
Sadly this rarely happens. The answers are there, but the effort is not.
Now — what does this have to do with eBay sales? A lot.
Many sellers — especially those new to the game — are buying product from distributors and manufacturers that have been exposed to customers for decades. These companies are merely using eBay sellers as another sales channel. As a seller, you should consider them a prime resource for mining that sales information.
Use this information to improve the way you present and describe products in your listings.
In many cases, you may find that the information you glean directly from sales sources will conflict with the marketing materials you receive from the company. This is not unusual.
Place your faith in the direct feedback you get from sales people. They´re closer to the street and often understand market forces better than the creative types that inhabit the marketing cubicles back at corporate.
Again, find out what customers need, care about, complain about and respond to and use that information to your advantage.