I interviewed Robert Medl, a bingo collector and enthusiast who has just purchased many machines.
Robert discusses his first experience and purchase, his current lineup, and some of the games in his restoration queue.
The bingo repair videos discussed are available at the following sources:
http://www.bingorepair.com/ http://www.marcospecialties.com/pinball-parts/BBSG-1 The first is a direct download for $15. The second is $30 + shipping. I have not reviewed these myself, but Robert is the third person who has told me that they are very good.