If you Google "Pfaff 2044 sewing machines" you will find lots of info online. I will link a few reviews for you and will also look for any "completed listings" on eBay for the machine to give you an idea of its current value.
Here is an old QB thread that mentions this machine (note that it is dated 2010!):
http://www.quiltingboard.com/main-f1...on-t65263.html
And here is another QB thread about the machine from 2013:
http://www.quiltingboard.com/main-f1...e-t227865.html
Here is a machine that sold on eBay recently for $305 + 50 shipping:
http://www.ebay.com/itm/PFAFF-QUILT-...cAAOSwiLdV~ZvH
And here's another listing that sold for over $400:
http://www.ebay.com/itm/PFAFF-Sewing...sAAOSw9N1VxpEI
Judging by my brief look at the comments and at how the machine has held value over the years, I would guess that this would be a very good machine for your wife.