So i purchased a flash (yn465) on ebay where the seller shipped from hong kong. The flash did not work so I contacted the seller directly and they said to ship it back and they will exchange it. I asked if they would pay for the shipping (about 14) and they didnt respond for a couple of days...so I decided what the heck and opened a dispute. The seller responded promptly (within minutes) and said he would offer a partial refund for shipping costs and would then replace the flash. I accepted the offer and am now waiting on the second one....hopefully this one works! I guess the moral of this story is that if all else fails open a dispute and some people will actually be scared enough to do the right thing.