I love mine!
Make sure it has the manual, and foot pedal assembley. Those two things took me a year to find. If the manual is missing, I can help you, though. The 2nd thing you should know is that the bobbins for it are not carried at many Joann's, but you can get them around.
ps, it makes a stitch like a little scotty dog! and if that isn't enough, it threads the bobbin right in the case without taking it out or unthreading the needle!
Here's what someone else has to say about it:
http://www.tandtrepair.com/Athena2000.html