IMO trading becomes 10x easier once you get a modern Stern game. I was lucky and found someone who offered me an AC/DC Pro for 2 older games I had fixed up. I have basically been able to trade that a few times for other Stern games until I found a keeper.

It just seems to be a more straight forward trade as Sterns values seem to be more well defined and they are often in better condition that many older games. A lot of 90s DMD game values seem to be all over the place making trades more complicated.