PHS Main Unit (JD-B7), Set of 3 Sub Units Doraemon PHS Other + 1 PHS Unit

This is a set including a Sharp answering machine as the main PHS unit and three PHS units as sub-units.
*Corrected to 3 sub-units

Main unit: SHARP Digital Cordless Phone JD-B7 (antenna broken)
Sub-unit 1: Doraemon PHS Paladio 316S
Sub-unit 2: ASTEL AU-01 (button peeling)
Sub-unit 3: Paladio 312S

PHS unit not usable as a sub-unit: Mitsubishi PHS TL-PH10-P

All sub-units power on after replacing the batteries with compatible alternatives. Spacers or similar are used to accommodate the battery size, but the covers close securely.

I used these during the PHS era with devices like Doccimo and kept them hoping to relive those times. However, as I have no opportunity to use them, I am now selling them.

For households with a landline, these can likely be used as cordless phones.

I believe there are few items preserved in working condition, so I have set a price for the set.
The price may be high as I am unsure of the market value.
Please feel free to comment with any price negotiations.

Thank you for looking.