First I want to wait until the headphone claim is actually confirmed and second, you can still make a claim for them if you purchase up to and including 19th Oct.I would think it will sell fast now if you are willing to lose a little bit. Maybe sell it for $650-675.
Id be fine with the 4a 5G but i would like to have the wireless charging w/ the P5 but only if it is on sale during the hollidays.
Size wont matter in either case. 6.0....or 6.2",..... the way they are built the 6.2" 4a 5G wont be much bigger than my GS9 was.
People are selling their upgrades on eBay for £550 sealed. Although mine isn't tied to a contract and I also have the colour (sage) that sold out most places.