Really? Not even at work? They are an ancient and annoying technology, but unfortunately I still use them at work multiple times per week -- hospitals faxing over their records on our patients, faxing around prescriptions and referrals, etc.. I only have to send one for personal reasons once or twice a year... usually it's easiest to just get away with using a work fax (since I don't even have a landline phone line to begin with).
I tried using a Skype-based service (PamFax) earlier this year and it was a complete disaster -- their billing was done through Skype's marketplace and once I paid Skype for the service, the fax program would never successfully see the credits and after several days of wrangling I had to ask for a refund. In the meantime, I had to use another service... it definitely cost more than $0.99/five pages for a domestic US transmission -- I think I sent four or five pages and it cost around $2.00... Also the $0.99 app price basically pays for the first fax. Granted that's a lot more than it actually costs to transmit a fax, I'm not aware of services that are much cheaper.
Pika, is there an even cheaper one you'd recommend for this kind of rare one-off faxing?