Hi ebayers - As a respected power seller i would like to share my knowledge of how to buy in a safe manner on this wonderfull site.
In my experience always pay with paypal or an equivalent money transfer agent such as pppay or nochex as you WILL have comeback if you experience problems with your transaction. When shopping on ebay it might be worth looking for the paypal cover up to £500 as this shows a respected seller within the community.
Feedback is generally a good pointer but dont let 1 or 2 feedbacks put you off of buying as the majority is normally right. Maybe contact a past buyer of the products your looking at.
Lastly always ask questions - a good seller will only be to pleased to answer any queries you may have.
Hope these are good pointers