Charlie,
I'm not sure how much experience you have with eBay/PayPal. If you have any concern on receiving your refund then hopefully many others will chime in and put your mind at ease. Don't even think twice about placing an order from another seller while you wait for your refund. I was very surprised to learn that your deal for the free batterry with P3P wasn't legit due to the sellers feedback however, your money will be returned soon. If you call PayPal and explain that others that responded to your same deal have already been refunded, they're likely to put it through without further delay. The $779 price from Pixel Hub is likely to push me into buying a "spare". I'm not buying the P4 yet, love my P3P and likely will end up with the next version of the P4 whether it be a Pro, black edition etc. Although it's possible prices could still drop a bit on the P3P, I wouldn't risk losing out on this offer over the possibility of a slight improvement on price. Good luck.