I'd say 1950-1960 era, $25-$50 value if not fully serviced. If it is serviced, then you can add $100, because that is what the service would cost.
This does not look like there is anything about it to make it special - like being Pink or having some neat features that you don't find often. It's just a basic straight stitch machine.
With vintage machines, you never know when there will be a collector out there that is looking for something very specific and is willing to pay for it.