Personally, I don't go by the number of negative feedbacks a person has. You could have 125 negatives and 30,000 positives...that would be quite good. I go by the percentage of negatives a seller has. If a person has more than 1 negative per 100 positives, I think long and hard before bidding on expensive items. This guy has in the 96% range, which kind of sucks. That means that nearly four people out of a hundred are not happy. Plus another four people per hundred gave him nuetrals. Many people give neutrals to avoid retaliation so I tend to look at neutrals as negatives. When you look at it that way, 8 out of 100 people are not happy, which is a lot of risk when spending that kind of money.
Somebody else mentioned that the extras weren't worth the $400 the seller says they are worth. I agree! He claims the cleaning kit is worth $29.99. On what planet????? Try about $3.99.

Also, the 128mb memory card isn't worth that much. Memory is going down in price and I've seen the 128 mb compact flash cards for around $50 at office max. That table top tripod is worth about $5 and OMG, no way is the camera case worth $99! I have a similar case and paid $14 for it.
If you do buy the camera, make sure you purchase insurance, and if at all possible, use a credit card that guarantees your purchases. Most ebayers are ethical people. I've been ebaying for years and have only had two people not send me my item (out of about 600-700 transactions) so I think the risk is relatively small. It would probably be ok. But if you can find a similar deal from somebody who has better feedback, I'd look elseware myself. Good luck to you!