CAN I MURDER THIS MONEY-STEALING MONSTER?

To ward off this bad dream, always follow eBay's first commandment: Know thy seller.
1. Check the feedback.
Never bid without checking the seller's Feedback Score. You'll find it in the Seller Information box in each auction. Once there, click "Read feedback comments" to see what other customers had to say about the seller. If someone is operating a get-rich-quick scheme--or is just lazy and disorganized--these comments will quickly reveal the seller's weakness. Look for a seller who's been in business for at least three months and has a positive feedback percentage of at least 96 percent. Scammers will find it hard to maintain a positive rating for that long.
2. Dig deeper.
Click the seller's name on the auction page to get to the Member Profile, then click "Learn more about me." (Not all sellers provide this info, but if it's there, it will show up right below the "Add to favorite sellers" link.) Is there anything more than an e-mail address? If not, be wary. If there's a phone number, call it and ask a question about the product. Or simply click Contact Seller and send a message. According to the Internet Crime Complaint Center, the buyer knew nothing more about the seller than his or her e-mail address in most cases of nondelivery.
3. Buy from those you trust.
If you've not bought from a seller before, see if that person is a member of PayPal Buyer Protection plan, which provides buyers $1,000 of protection against nondelivery and a host of other nightmares. Only sellers who have met PayPal's requirements--for example, a feedback score of at least 50, with at least 98 percent of your feedback deemed positive--can offer this plan.
4. Check your insurance.
If you bought from someone not covered by the PayPal plan, eBay will refund up to $200 of the cost (minus a $25 processing fee). However, if you paid by credit card, check with your bank; some cards offer 100 percent guarantees against online fraud.