I bought a Bernina Artista 200 used off craigslist when it was 3 years old. Saved oodles compared to buying it new. The owner was even selling her Isacord thread for a $1 per spool.
Since then I have seen about 5 embroidery machines on craigslist.
Be aware that you can spend a bundle on embroidery software. So, if you are able to buy used, it will leave you with $$ to spend on software. :-D :-D
PS: someone mentioned this prior to me but yes, the ins and outs of your computer compatibility with your sewing machine can be interesting. Just check things out carefully. Also, I have a friend who recently bought a Brother due to her budget and she LOVES it.
OK, so there is the embroidery machine; threads; all sorts of stabilizers; software and classes... Cash outlay begins to add up. But, it IS fun to do and there is lots to learn! I am not trying to scare you but rather, let you know what I didn't know going into machine embroidery.