You could have VOIP in a office for as litlle as few hundred dollars, allowing you to save on long distance and overseas calls.
Also, if you have two or more locations, you could interconnect them via VOIP for as little as a $200 gateway on each end and some singel line phones on each end.
Now, if you want those lines to show up on multi line phones, or be part of a PBX equipment, the price goes higher inmediately.
If you have any questions about it, feel free to give a e-mail
Mike 3799@yahoo.com