I have purchased on ebay quite a few times, and from what I understand ebay is supose to be cracking down on the sellers who for example sell something that weighs 1 lb and charges 20.00
you really have to watch and read all the details and ask the seller questions, the majority are willing to help, and decide if the total price including shipping, handling and the item are going to be less than you can find elseware. The majority of the time I check prices in stores before hand, then do a web search for the item to see what others are getting and if ebay is a better deal I go with ebay
The best way to pay for things on ebay is via PayPal, you can use your credit card, or do an e check via a checking account plus more such as send money to anyone with a email address which came in handy when my son was at school
some sellers will allow you to pay by personal check also, but this way takes much longer and all are not always willing.
I have never been ripped off on ebay and happy with everything I have purchased