I was living in the Netherlands at the time and I remember Nintendo cartridges being sold for up to 250 guilders at Fame on the Dam square (1998) The shop is gone now, there is a bank in its place. I used to get my Laserdiscs there at 80 to 90 guilders a piece. The guilder (doesn't exist anymore either) was worth about $0.52, so around $45 for a Laserdisc and up to $130 for (imported) Nintendo games.
I miss the times with both Guilders and Belgian francs,cheaper times and it actually looked like i had money in my wallet.(well yeah all cheaper except for the games)
I went a full night out with 500 Belgian francs or around 25 guilders that are now around 12,5 euros/14 american dollars,crazy how prices inflated so rapidly after the Euro beh.