I have a Juki TL98Q and love it. Just make sure you oil it frequently--it gets very thirsty. I have mine on a Little Gracie II frame and that's the only place I'll be using it. I got mine as a combo, but the machine itself would have been over $700. Getting one, even used, for $100 is great.
There is a Yahoo list for the the Juki:
http://groups.yahoo.com/group/TL98EJuki/
I suggest you join it. You can get lots of info, including where you can order parts for it. Good luck with it.