Since the public landline telephone system has been switched to SIP now (more or less all of it), it makes sense to start using native SIP phones instead of connecting an analog or ISDN or DECT phone to a SIP-capable PBX (such as FritzBox etc.).
Of these native SIP phones, I would like to try a wifi handset. This is a device looking much like a DECT handset, but instead of connecting to a base station via DECT ("IP-DECT" technology, using the CAT-iq protocol) it would connect via wifi. So, if there is a dependable wifi setup in the building, there's no need to add DECT coverage as well.
I know I can use any Android device with a SIP softphone app for this, but since there are people in the household used to a "proper" phone and not yet to "fiddly" smartphones, I rather want a single-purpose phone device with hardware buttons.
I found several models, but all around 300 USD or more. That sounds very strange, given that such a device is not more complex than a DECT handset available for 80 USD or less. Am I missing something?