Hello friend,
I searched some item on eBay without log in, and I was shocked to find that the shipping charges and item charges for some items are less when i was not logged in. And when I log in to eBay to purchase the same item, it shows more price.
This might be due to eBay takes registered users as more granted and and more probability to buy items from them.
For proof I have a screen shot of eBay website. you can download and verify it.
http://www.4shared.com/file/A0fR_MUK/Fraud.html
Change the file extension to .jpg
The upper half of image is of IE without log in and lower half is with Firefox with log in