There are services like eFax that will let you send and receive faxes from a computer. There free service is receive only, for which you get a non-local number and they e-mail the faxes to you. For out going they charge, and it is a monthly fee of ~$20, not worth it for hte odd fax.
I mention all this because I assume that there are similar services available from others, one of which might be a pay-by-the-page.