I’d say I’m a casual eBay seller.  But somehow, everything I list ends up selling for more than the average comparable product.  My friend asked me how I do this.  Here are my tips:

• Set your initial price low.  That gets people interested.  If you set it at the price that you want, nobody will even add it to their watchlist.
• List the auction to end on Saturday or Sunday night sometime between 6pm and 11pm.  When somebody bids on it, the item gets added to their watchlist.  Saturday and Sunday nights are when people have time to watch the auction and make last minute impulse bids.
• Set the auction to go 7 days.  I’m not sure this is the best tactic, but I think it is.  This gives enough time for a lot of people to see the item and to bid but it isn’t so long that potential bidders might get disinterested.
• Make sure you have all the specifications listed.  I usually go to the product’s website and copy that.
• Be honest in what you say.  Describe the scratches and blemishes but reassure them of the functionality and quality of the product.
• Make sure you include a picture of the actual product (Not one copied off the internet).  This gives the user more comfort that they know what they’re getting.
• Make sure you answer questions quickly.  That gives potential bidders more time to bid.
• This is one of the most important things: you want the customer to have a good experience, which is why you should be completely honest in your description of what you post, ship it off promptly, and send them a congratulations/thanks email when you’ve shipped it so they know when it’ll be there.  Good reviews mean people will be a lot more willing to trust you in the future and therefore are more willing to bid.