I bought these last week and they are great for £20 and look pretty nice. Loads of feature including an alarm clock(???) and also 2 years manufacturer warranty. Won't be everyones cup of tea but thought I'D post anyway.
Also single handset is £12.99http://www.argos.co.uk/static/Product/partNumber/5527605.htm
Siemens Gigaset AL145 Telephone with Answer Machine - Twin.
Suitable for wall mounting.
60% less power used when in Eco dect mode.
40 name and number memories.
Ringer volume control.
Speaker volume control.
Up to 13 hours talktime.
Up to 200 hours standby time.
Up to 50m indoor range and up to 300m outdoor range.
40 call log.
Last number redial.
3 line LCD display.
Keypad lock on handset.
DECT (Digital Enhanced Cordless Telecommunications) radio technology.
Answer machine features:
1 pre-recorded message.
14 mins recording time.
Message playback from handset.
Batteries required 1 x rechargeable per handset (included) .
Manufacturer's 2 year guarantee.