In much of the US this is a very common machine, in a plain cabinet (they often have carved drawer fronts and sides). The machine decals appear to be in very good condition, but I think I see some water damage to the back right section of the cabinet top. If there is more damage on the top leaf, it would negatively impact the value.
Price varies a lot by region. I have heard that antique machines are more expensive in Texas than some states, so it might be worth up to $200... it really depends on the buyer. Where I live it would probably sell well if listed for $100-150, and sit unsold for quite a while at $200.