Suggest me a good Phone/Fax

Hello..

Im looking to buy a Phone/Fax for the office. We will have 20-30 fax only in a month.
Sending and receiving. So, not that much usage.

I was looking at HP® 640 Inkjet Plain-Paper Fax .
Amazon.com: HP 640 Inkjet Fax Machine: Electronics


Just wanted to know, if its good to those Inkjet Fax , because Im not sure, what will be the monthly cost for using such inkjet faxes.

So, let me know , if its good to go with it.

Also, let me know, if you have any other recommendation.

My budget is 100$ only.