Yes. I had a P3 for about 2 weeks and bought an extra battery with it. I then upgraded to the P4 and was left with the P3 battery. It is virtually brand new. I only bought it back in late November. Its truly a brand new battery.
Yes. Paypal would be fine. Private Message me your email address associated with PayPal and I will send you an invoice. I sent you my phone number in PM.