I don't know this particular machine. The case is an old style case, the machine is newer than the typical collectible vintage Singers, and Brother is not a particularly collectible model. Where I am, a machine like this would probably be offered for sale in a thrift shop for about $30, or at a garage sale for $25.
You want to make sure that it works and that the cords are in good condition. I buy old sewing machines to fix up for a local non-profit and they average me about $25; however, I pass up machines with bad cords because I don't want the trouble of re-wiring.
It does look like a cute machine! Just be aware that these machines tend to be very heavy. If you have to pay for shipping, it's probably not worth it (plus it must be packaged very carefully to avoid damage in shipping).