EBay, it's not just for kids anymore. There are some MAJOR players using eBay to sell their products and if you're not selling there then you're missing out.
EBay's one of the most powerful tools for marketing available to online product sellers.
Here are some articles that will get you started using eBay in your marketing strategy:
The Auction Block Rocket: Taking Off With Ebay
From WebPro to AuctionPro: How To Rocket Your eBay Profits
Marketing Your Site on eBay