Sounds like a Singer 15 clone. As a general rule they aren't valued really high, but they are pretty strong machines and work really hard. You can also sew through some pretty thick materials. I have a 15 clone that's an "International" and I paid $20.00 for it, but then we had to replace the power cord. It's worth what you're willing to pay for it. If it were me, I'd try and talk them down a little.