I'm 35 now but I remember in the early 90s going with my dad to an auction house in Redford, Michigan, which I believe was Eagle Auctions. We went a few times and all you had to do was bring your own extension cord and you could play test any of the games. There was a Funhouse there that I begged my dad to get but it sold way out of our price range for $2000 back then since it was still considered new and popular. It was a warehouse full of games that happened several times a year. This was the time when Addams Family and T2 were considered state of the art games on location since they had the new DMD display on it, but you didn't see them at auctions like this just yet.
One time, we had a truck load of games which included:
Flight 2000 pinball
Demolition Derby four player cocktail arcade
Rygar standup arcade
70s Seeberg jukebox
English Mark Darts
Chexx (blue base)
Heavy Barrel standup arcade
Double Dragon standup arcade
I remember my dad pulling up to the front of the house and my mom coming out in complete disgust seeing the rental box truck. I jumped out of the truck exclaiming "that we only spent $2,000!" She REALLLY flipped out on my dad after I said that - I had no concept of money at the time. It was fun time looking back, we kept them in half of our two car garage and some in a ten by ten foot basement room. We sold everything but the jukebox, Flight 2000 and a Space Shuttle pinball that we purchased from a local bar, to a man that had a apartment on the 4th floor in the mid-90s.
I didn't focus on arcade games or pinball until about 2009 when I got the bug again. There was still lots deals to be had still back then, I remember a Addams Family selling for $2,400, mint Twilight Zone for $1,100, Funhouse for $1,500, World Cup Soccer 94 for $800, Bride of Pinbot for $800, and a White Water for $2,000.
Looking back at the 90s, I used to pretend to run my own arcade as a kid, which probably resonates to what I do today. Today I now operate four pinball arcades in the Detroit area.