Use Google Checkout
I was going to write a longer note on Paypal and eBay, but after some time to cool down I do not think it is worth it. Instead I am going to recommend, wholeheartedly, the use of Google Checkout for all your payments and shopping needs. Really, once again Google did not let me down and transformed an otherwise nightmare into a pleasant auctioning/shopping dream.
If you must use eBay, find a way to use Google Checkout with it. You will thank me for it.