Another seller has managed to sell two XA2 H4413 for €319 including shipping:
https://www.ebay.com/itm/Sony-Xperia...-/274017549622

Approach seems to be to promote as a Sailfish OS device (Buy-it now not auction) with its implied virtues, so whether increased demand for Google free alternative or buyers don't want "flashing hassle" whom can say? Obviously got it all wrong upon my XperiaX by taking TABackup to restore DRM thinking more appeal if restored to "factory state", when he sells one with Sailfish OS for about €200 with shipping:https://www.ebay.com/itm/Sony-Xperia...-/273984017029

Perhaps as forum users we assume that no one is going to pay extra for something you can do yourself, whilst user just wants it to work "out of the box".