Anything

When Buying or listing on Ebay, the best thing to do is check out and compare prices and how many are there at the time, then you will know when to buy or sell..
When buying, check out the lowest S&H for the product, check out the feedback
When listing, see what everyone is doing, do not start at a high price, I notice no one wants to bid on a high starting bid.
I also noticed no one wants to BUY IT NOW. They feel they can win it at a lower price, but sometimes that is not the case, they could be outbid as I have seen it many times and you lost out.
Did you know there is a free website called Wensy, but there is not much traffic there, you have to pay to make it worthwhile on Ebay, U have to spend money to make money. Great saying.