Quote Originally Posted by redrhodie View Post
The other day I ordered something on Ebay. [...] how many stars should I give him? Do I still give him 5*, or do I deduct for the mistake?
I hope you're aware that leaving a star rating of less than 5* puts the seller on the way to being banned from eBay. It used to be that a seller with mosty 5* feedback with a smattering of 4* could be kicked off. The situation is a little better now, but a few impossible to please / psycho buyers can still get a seller banned.

As mentioned above, not leaving any feedback at all is a good option that doesn't actively hurt a seller. It is also possible to leave +/-/neutral and skip selecting any star ratings.