It's a lot like Whirlwind if you've played that. Knock out the lit targets to light lock. Lock ball. Repeat with different lit targets. Lock 2nd ball. Start multiball.....light jackpot, collect jackpot. Pretty typical rules of the late 80's. Great backglass, parts are generally available (including cab decals, repro backglass, plastic set, ramps, sinking building mod, etc). Playfields are coming soon too.
Value varies widely based on condition. Nice ones bring well north of $2K (ones with a bunch of new parts) and player examples are closer to $1,500.
Check to make sure the "fault" is working properly. This is the California/Navada map in the back of the game. It is opened/closed by a solenoid and held open by a cam that can be troublesome. To test it in gameplay, lite lock 1 and hit the side ramp. The "map" should open and stay open to divert the ball into the scoop (and not let it return done to the left flipper return) before closing.