call a local Viking dealer & ask---they will sometimes even purchase them- you could check their website too- I don't know if Viking has it or not but singers will actually tell you the value of used machines right on their website- Viking may too...my dealer is really great, I've called & told them- I just came across this machine & was wondering what they cost used...since they take in (trade-ins) they may even have one in the store that you could ask how much they are selling it for....would give you an idea- or you can do a search to see what they are going for now & make a fair 'guestimate'