Don't be a FEEDBACK JUNKIE. You are suppose to be on ebay to purchase items- NOT FEEDBACK!!! If you beg for feedback most sellers will not leave it for you. Feedback is not about you per se, it is the opinion of another of the transaction they just had with you for the benefit of other sellers/buyers. It is not a thank you and for sellers to leave fb as soon as the buyer pays shows no one how that buyer may react should something happen such as a lost package, normal shipping delays or damage not anticipated.
Lastly ebay is a VENUE therefore they will not take responsibility for the opinions of others. If you are a considerate person and conduct yourself as you would if you were face to face with the person instead of an anonymous e-mailer, you will find people are a great deal more receptive to calm statements rather than irate ranting and will usually respond in kind with the same treatment. PLAY NICE KIDS!!!