Too few games are changing hands and games are becoming increasingly customized.
It was the easy buying and selling that enthused me. 10 years ago the games being sold were basically unmodified originals. A Fish tales was a Fish tales and it cost a grand. It was not some re-released vault edition with £1,000 topper, exploding node boards, flipper cooling fans, side blades, colour dmd .....
You could easily sell them a few months later plus or minus 100 quid. Folk knew what realistic prices were. You did not get a Bad Cats on ebay with £8k buy it now.
I bought games I didn't know at all - Fish Tales, Paragon,
BK2K, Funhouse, Roadshow, Vector .... just to try them. There wasn't much money on the line if I made a mistake.