What doe it mean to be a good buyer on Ebay.
Well for me it means sending the payment for your item as soon as you possibly can, sellers like to receive payment quickly.
For me it means as quickly as you can as soon as the auction has ended, and when you receive the item, check it out, have a good look at it, including the packaging, and leave the positive feedback rapidly.
ifwhen the auction has finished and at that time your a bit tight on the money side, contact the seller and inform them when you will remit the payment, it proves your integrity.
If you have to leave neutral or negative feedback, dont be insulting.