Quoted from Jared:I mean, if it was 1500 in 1990, then how many could really be left?
No scientific proof...but for game made prior to 1990 that isn't a "collector" pin I have heard that you take off 20% off the market for ten years...then 20% off that for the next ten and so on.
If this were true there would be around 960 out there in the "market".
I actually have seen several for sale...when priced around $1,000 they seem to move quickly, prolly cause of the theme.