I can't see eBay here at work, so I am not sure on how much these speakers are. You are much better off buying from a shop, this way if you have any troubles whatsoever, the shop will be able to help you out in most circumstances. It will also give you a chance to demo before you buy, even if it is only for 5 minutes. Just make sure when you mount the speakers you make a nice solid spacer out of MDF or something similiar. You may also need to get some sound deadening material in case you have any rattles from inside your door. I don't think you have indicated whether the speakers will be amped or not also...