Make sure you have all the accessories/feet that come with the machine. I purchased a Janome 4900....met the lady at Joann's, plugged in the machine, it worked OK. When I got home, found that several of the key feet were missing.
I did get her phone number, address and I also wrote down her license plate just in case,,,When I contacted her, she apologized and brought the three feet to me. Just try out the machine. Ask when the last service was done. I went to the dealer to check on her service record on this machine...it was perfect. Make sure that the foot fits that machine and that the plug is there in the event you cannot plug it in. Good luck on your quest. D in TX