If it is in good shape and functional, grab it! I'd offer $150 and work up from there, but that's just me :-D
The Smokette was designed as a brisket cooker and it does a great job! It also works for any type of BBQ (butts, ribs, chicken, etc.) but it really does a great job on brisket. It is great in cold weather.
You do have to be careful with the amount of wood used. A small chunk goes a long way. it is possible to over-smoke easily.