Are you finding that auction after auction fails to attract any bidders or buyers? It happens to the best of us sometimes take a good look at these things to see if any of them could be making your bidders avoid you.
The starting price was too high: People dont want to have to make a high bid before anyone else has you should always start your auctions low and let the bidders bid them up.
The fixed price is too high: If youre just selling with Buy it Now, then of course your items wont sell if theyre too expensive. Try reducing the price a little each time the item fails to sell.
No picture: Most buyers are reluctant to bid on something without a picture, and that goes even more for high-value items. Think of it from the buyers point-of-view: would you want to bid on an item when youve no idea what it looks like?
You had a reserve: Reserve prices scare away buyers like you wouldnt believe, not to mention costing a percentage of your final sale price. Avoid them like the plague.
Bad spelling and grammar: If your titles are spelled wrongly, then no-one will find your auctions. If your descriptions are incoherent, then no-one will know what...