ROTFL!!!
500,000 in 1999? More like 50,000 and I'd regard that as optimistic.
I doubt there are still 20,000 active Amiga users left. Even 10,000 is highly optimistic and unlikely to represent the actual market, which IMHo is no more than 2,000-3,000 at best.
Like I said earlier though, those 2-3k systems will be sold very quickly, and then what?