Buy.com has Uniden 2 Line Expandable Cordless System with Dual Keypad and Call Waiting for $24.99 + free shipping.
Features
5.8 GHz Digital 2-Line Expandable System
10 Handset Expandability (Maximum)
Caller ID/Call Waiting Deluxe† - To activate the Caller ID and/or Voicemail features, you must subscribe through your local telephone company.
Banner Display - Name Each Handset
Base Keypad
Handset Speakerphone - This feature gives you the freedom to use the handset as a speakerphone.
Base Duplex Speakerphone
Programmable CID or Memory Locations at Handset/Base - 100
Do Not Disturb (DND) - Silence the phone so you can work without distractions.
Conference Calling- 5-Way
DirectLink™ Technology - 2-way Radio Communication
Mute & Hold Features
Advanced Phonebook Features: - Store up to 100 Names, Store Up to 2 Numbers per Name, Alphabetical Search, Personalized Ringers, Transfer Single Listing or Entire Phonebook
VoiceMail Waiting Indicator† - †To activate the Caller ID and/or VoiceMail features, you must subscribe through your local telephone company.
Intercom or Call Transfer Between Handsets
20 Ringer Options - 10 melodies + 10 tones
10 Speed Dial Memory Locations
Trilingual Menu Displays - English / French / Spanish
Room Monitoring
Battery Level and Clock Display
Earpiece & Ringer Volume Control
Ringer Off Option
Find Lost Handset / Paging Key
Headset Compatible - Allows for an optional headset to be connected for convenient hands-free operation.
Wall Mountable
Belt Clip NOT Included
Handset Battery Type: BT-446 NiMH
Uniden 2 Line Expandable Cordless System with Dual Keypad and Call Waiting $24.99 FS 
