Here is a telephone I am selling on ebay , if anyone might be interested. It goes off Saturday 29, 6:17pm eastern standard time.
http://www.ebay.com/itm/232420539366
The listing says to check with your provider to make sure they accept Touch-Tone dialing. All providers support DTMF these days. You just have to make sure the polarity is correct, if this phone does not have a polarity guard inside.