I do not know if it is locked. Appears to be in good condition. Powers on, not tested further. I do not know if it works.
eBay
Wood Candlestick Retro Telephone Antique Phone Rotary / Button Dial,Caller ID,LCD Blue Backlit,Antique Landline Phone telefono
Aliexpress UK
eBay
KXT-580 Big Button Corded Phone Telephones Landline Phone with Call Light Redial Pause Support Wall Mount or Desk Phone
Aliexpress UK
Yealink T40G telephone for home and office use. Works perfectly fine but I don’t have a spare wire for it so you will have to use a one you already have. Works on PC and as a landline.
eBay
4G VoLTE Wifi Router Wireless Landline Voice Call Router Hotspot Broadband Fixed Telephone Wireless Desktop Phone With Sim Slot
Aliexpress UK
Model: H390D RJ9. Convenient and practical. Feature: 1. [DURABLE STRUCTURE] Binaural phone headphone features a sturdy structure and materials that ensure super performance and long lasting durability.
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TIANJIE 4G Wifi Router LTE GSM Cordless Fixed Voice Call Desk Telephone Landline Phone Wireless Modem Wifi Sim Card Booster
Aliexpress UK
eBay
Feature: 1. Screen Color: Color Screen. Fidelity Sound Quality: HD Hands Free HD Joystick. 1 x Adapter. If you do not receive our reply within 48 hours, pls. If you are satisfied with our service, pls.
eBay
The Avaya 4610 SW IP Phone is a full duplex IP ready speaker phone; featuring a 5 line, 29 character grey scale display; 24 programmable call appearance / feature keys and 9 fixed feature keys.
eBay
DX800A has Bluetooth, will allow 6 VOIP accounts and one fixed line connection. 3 built in answering machines that can be assigned to different handsets, very versatile.
eBay