you are lucky!
It happened to me last week. Thanks to a very friendly collector I was able to complete the 700 series. He wanted to get rid of the Blue 700 and I wanted it as a last piece in the 700 puzzle. So we came to a good deal for both. Thanks a lot Peter, I am so happy with it! She is in good hands.
Never dreamt to have the blue model so fast. But it is really there, nice and shiny, like new. It is a 12 button model from 1980, fully operational.
By the way, the pushbuttons of the 700 do not produce DTMF tones as you might expect. They produce pulses, similar to the rotary dial models. This is all state of the art pre-DTMF technology.