Very cool, I have little to no knowledge of production numbers. I have seen this title in person only one time. I don't remember the gameplay too much so it must not have been memorable. The art is cool and it is awesome you shared this. If there is truly a way to prove there are only 10 units that left the factory then its gotta be upwards of 5k. Condition looks good so maybe a little higher than that. Have you reached out to the different pinball museums etc? They may offer more in trade value for something they don't have.
GLWS!