I purchased headphones in uk and got them delivered to a friend's address in london. only, they never arrived. I paid using paypal. the seller claims he shipped it. he has a printed receipt to show that he shipped something on a given date. no addresses except the pin code written by hand on a printed receipt. He shipped using the service he mentioned in the ad, without a tracking number. he doesnt mention in his ad that he will be using a tracking number or not. I opened an issue on ebay and he replied by sending the receipt. I can escalate the issue to the customer service if we are not able to settle it mutually. Whats the best course of action here? Who does ebay usually favour in such cases, buyer or seller? I have 10+ +ve feedbacks, he's been a member for 5 years and has 1 +ve feedback. Neither has -ve feedback.