It was posted in an unsual FB group so I am not sure how many people have seen this , sounds like a nice set of machines:
OP: Just to clarify it's $500each,
Restored working Bally's pinball bingo machines from the 40s 50s and one is from the early 60s very very hard to find in this condition and working all machines have keys to the lock boxes and the people that don't know about these machines they were before they had flippers but they still play like a nowadays pinball machine they are very valuable then my asking price but they were my father's and he has since passed away and I just need the space that's why they're priced to sell please do not try to lowball me any lower than the price I'm asking the silver sails game of the three is one of only five known in existence left and this one is in working condition
https://www.facebook.com/groups/britslist/permalink/2910401995756023/?sale_post_id=2910401995756023