Sellers who want to make money on eBay should never discount the value that positive feedback brings to their sales. In fact it is not just the positive feedback percentage that matters, but also the total number of feedbacks that have been received, and how you use that information. If you have a very high percentage of positive feedback, show it off. Let all prospective buyers know about your positive feedback.
Experienced buyers are more likely to deal with you when you have a very positive feedback record in combination with a large number of feedbacks. The greater the likelihood that prospective bidders will deal with you the greater the likelihood that you will in fact receive bids. More bids can mean that you are likely to receive a higher final price. Higher final prices can mean that you make money on eBay.