I restored one for my son in law ....lot of work ......really complicated machine and the schematics ...well lets just say they sucked .......they would show an open contact for each switch, relay and you had to determine if it was to the right or left whether it was NC or NO ......I find in this hobby most of the people opt for machines they played as a teenager and since the bingo machines were popular in the 50's and 60's those guys are all over 70 so the demand for them is not there anymore ...you can find a lot of machines for less than 400 bucks and that is probably paying too much. These machines were like slot machines back in the day and when there is no real payout in money the excitement is just not there for them, not to mention the market.