For me classic gaming has been about giving a home to games and consoles no one wants any more; a chance to see what's out there costing very little or nothing at all. It was also making huge mistakes without realizing it like just handing someone all of your dupes without getting anything for them in return. I've discovered games I either couldn't find or couldn't afford in new condition.
For a while almost every yard sale during the late 1980's to mid 1990's almost always had a 2600 collection up for grabs. For a price between $5 to $10 one could grab a 2600 with controllers and at least 15 games. You could also sometimes talk the seller down a bit on price, too, and using any visual flaws to your advantage. I remember asking Mom one Saturday if we were the only people on the planet that had a 5200? Because I never found those but looking in the backseat of the car from one day's worth of yard sale hunting turned out about five or six 2600 setups with lots of games. Well over $500 in 1980's merchandise for about $40 - $50 total. I was stunned.
Once we would get home I'd take the machines apart, give the plastics a bath, remove the tarnish off the switches, and test all the games on the motherboards, essentially killing two birds. What worked I would hang on to, broken units I held on to for parts. After having 10 units and lots of games my room got crowded and I had to thin out the 2600s. My NES, 7800, and SMS had there spaces but the 2600s were growing out of control. If I was smart I would have asked my grandmother if I could keep most of it at her house. I would have lived there anyway. If I'd only known, right?
I did get a demographic of what Atari games were popular in my area. Pac-Man and Combat were with every 2600 I ever found. ET was almost always present along with Defender and Space Invaders. Pitfall! was favored by a few. Oddities included Dig Dug, Moon Patrol, Enduro, and Donkey Kong. Those I found once or twice.
My first thought into collecting classic games again was they were old so I can get some games cheap. Yea. I never thought of these old games going for high prices. Even some resellers still around are asking high prices. I'm not complaining but just stunned how games no one could sell for $1 is now selling for $100. Unreal.
I enjoy what I have but understand that the classic gaming market is starting to dry up.