I like many sellers have been looking for alternatives to ebay and have concluded that at the moment there just aren't any. All the so called competitors have plenty of sellers but few buyers so are not viable.
I have read on the ebay discussion boards some success stories from some big time ebayers who have started their own sites selling the same goods.
One in particular stood out. He has over 50,000 feedbacks but packed it in about 3 months ago but now generates sales of between 30 and 40,000 pounds per month through his own website and using google adwords. He spends 1,000 pounds/month on advertising.
I spend about 800 pounds/month with ebay and generate total income (including shipping) of about 3,500 pounds.
I think adwords may be worth looking into.