Finicky fax that looks better than it is

This fax machine should be fine- it's a business fax and I got a reconditioned model. Well, the thing is soooo finicky, sometimes it lets me fax in a normal way and sometimes I have to go through contortions, dialing only, not using the speaker.

My biggest gripe is that I have had people say they haven't gotten faxes even after the machine says they went through. Now I'm paranoid about this and send them all twice.

I paid practically nothing for this machine after rebates and coupons, good thing because that's what it's worth.