I live in the DFW metroplex area and bought my 15-91 off of Craig's List. I looked for a bit, and while I know others have found fantastic deals on theirs - I have never seen one priced like that in this area (I am talking under $100). Anything vintage under $100 has been in horrible condition.
I paid $150 for mine, it came in a cute table. I did test it before buying it, it sewed fine. What I didn't think to do was to check the electrical. Upon getting it home and using it, then poking around to oil/clean it - I noticed that the cords needed replacing. Not terribly expensive - but still something that needed to be done. I didn't make an offer on the one I purchased, because I am not very good/comfortable with going back and forth on this type of stuff. Looking back, if I had made an offer it would have been between $75 and $100.
I do think $200 seems a bit overpriced for that one (table will need refinishing, looks like maybe some rust on the machine, I can't see the color on the power cord - that would give a clue as to whether electrical has been replaced). Perhaps you can email the seller and find out if the electrical has been replaced?
I have attached a couple of pictures of mine. I absolutely love sewing on this machine - and FMQing just flows on it. My first top that I quilted was a king sized top.
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