After 8 years of buying and selling on the bay, I got my first jerk feedback. I sold something, listed it accurately, the buyer paid promptly, I left + feedback. Now, 1 month later they zing me-despite the accurate description in my listing. I've bought things listed as inoperative for parts only, but never left - feedback when the item was found to be inoperative! I learned my lesson. I'll never leave feedback until feedback is left for me!