Say some upstart pinball company with no prior experience manufacturing pinball machines came on this forum and said they would be making a new pinball machine themed after some old movie, band, TV show, or even maybe some now defunct amusement park or restaurant. But they would need a substantial deposit to ensure you would get one. Paid in full would get you to the top of the list of buyers.
So the question is what dream theme would get you to throw all caution to the wind and send off your pre-order money to somebody you don't really know because it is something you would have to have, and there is no way you would be able to live a normal life without it?