Florence, I loved my Athena 2000. I don't remember ever having any problem with it. After using it for about 15 years I did have replace the feed dogs. I seem to recall that it was a rubber piece. I'm not sure that's the correct piece but it was some rubber piece I had to order and I was able to replace it myself. I guess I wore it out. I wonder if parts are still available. I would say that if it works it would be a great machine for your niece.
I made many, many clothes and quilts for my children with it. The only reason I quit using it was that DH bought me a new machine, Elna, for Christmas about 8 years ago. I didn't need a new one and there were many features I loved about the Athena that I don't have on my Elna or my newest machine, a Bernina 440.
I particularly remember that you could fill the bottom without having to do anything with the thread, just push a button or lever. How cool is that? No threading around this or that, no getting a second spool, no taking the thread out and re-threading.
I still have that machine and the cabinet we bought with it. My guess is that it would still work well. I might take it in to get it "overhauled". DD has said that she wants to learn to sew, I could give it to her. She never wanted to learn before, maybe it's because she's almost 30. I do know, she's not getting my Elna!
I'm going to be curious to see what others say about the good old Athena. I had never realized it before right now but DH chose the three good machines I have and they were all his idea. We were in the mall one day and he took me into the store that sold Singers. He looked at the best and latest one and asked if I wanted it. The Elna was a complete surprise. Two months ago he carried my Elna into the store when I took it for maintenance, saw the Berninas and asked for a demo. He asked me which one I wanted. I left my Elna and came home with a Bernina. Boy, do I have a terrific DH!
JoAnne in southern California