MPire Research is a new (to me) website that gives you the information you need to make a successful and profitable sale on Ebay.
Search on the product you want to sell and they tell you
the % of items sold
the average sale price
the average starting price
the top selling day and time
the best listing type and listing duration
You can even get this information on your mobile phone!
how brill is that......
(my thanks to auctionknowhow.com for this information)