Not sure how many folks got this, but you can get 10% off any single purchase made on e-bay and paid via PayPal. I'm not sure if you can use it for 10% off multiple purchases from the same seller and paid with one payment. This code can be used only one time per account and for a maximum discount of $25.
Also, when I used mine, I got a confirmation of payment via PayPal, but it took 2-3 days for the payment to be processed (stated payment was "pending" on the auction page).
Here's the code (not sure if it's case sensitive)
Offer expires July 15/2005.