Indeed. I wish I had of taken more time and care in auditioning them, however it was late and I (perhaps stupidly) took them on face value.
I'm not too sure where eBay stand either, but I feel that I'll be finding out soon. I understand the seller's position too, but when playing both speakers together, to my (granted untrained, non-critical) ear, they sounded OK, and being not totally familiar with the speakers it was hard to be sure.
Visually there appears to be no difference between them, and there doesn't appear to be damage. I'm hesitant to remove them from the housing as I don't want there to be any issues arising from that. I had asked if there was any existing damage or prior repairs, to which I was told they were "perfect", and there had been no work done to them.
Have actually sourced a replacement tweeter for that price AUD. Will go that route if all else fails, just feel it's not really my responsibility to do so when they were advertised as perfect. I figure I'll take it to a B&W service place to get a report though, if all else fails.
I figured they should sound roughly the same (expect a pretty close match, really) - I've run them by a few people so far, blind test etc, and have all unanimously said it sounds horrible, when played individually - it's pretty obvious now, really.
Not entirely new, just haven't really had any bad experiences so far!