Much depends on what you are using it for and the volume of printing/scanning/faxing.
If you simply want something for infrequent use that will give economical use then a combination printer/scanner would perhaps suit. As for the fax facility, do you really need it or is it simply a 'nice to have'? Most people use internet for sending pages which can easily be scanned and added to e-mail - probably much cheaper as well.
Think on it a bit and give us a better idea.