About the pokemon games : fairly sure i still have a bunch sealed Ds games at my parents place of aleast one version or the other since i usually bought both versions when they came out.
Pretty sure my dutch box language versions would be going for a lot less money then american versions, same with french and german versions for that matter.
pokemon red/blue/yellow doubt a sealed pal copy would be going for even close to what an american version would go for.
Was talking about US versions with that comment
That being said There are stores in my countries that give 100 euro's for a cib dutch pokemon platinum instantly wich is 120 $ you can get more by actually selling it yourselves. they give even more for black 2 and white 2 and much more for heartgold soulsilver. I'd argue germany and french having a simular situation. and they don't differentiate between good to amazing condition
Very simular to USA prices with those examples prices can differ between titles but it's pretty insane in europe aswell.
as far as dutch english boxed factory sealed pal copies goes
It's hard to tell really considering they are really rare to find factory sealed you'll find usa version sealed in europe far more easy let alone that most deals especially in europe don't happen on ebay in wich prices are far harder to track down. let alone that even with outside sourcers not easy to track them down unlike factory sealed american examples.
You only see few pal factory sealed copies while you can easily find a dozen of usa versions.
Before the boom the prices where however really simular to US versions as in well below 1000$ for a factory sealed dutch english boxed version wich was crazy at the time. slightly higher for pal copies I'd argue since they have far less quantities.
I can only find one factory sealed copy of an english boxed version of a pal version on ebay for roughly 9K
https://www.ebay.co.uk/itm/154415705107?hash=item23f3e4ac13%3Ag%3AZvAAAOSw87hgWNMB&LH_ItemCondition=1000one dutch english copy being sold for 8K but graded. way higher than 2 years ago though, it was only less than 1000 than although I've seen some really high graded ones go for 1500 even more years back. sealed always had crazy values just not this crazy
https://www.ebay.co.uk/itm/VGA-85-NM-FACTORY-SEALED-POKEMON-RED-GAMEBOY-GAME-PAL-UK-CHARIZARD-HOLY-GRAIL-/324577320206?hash=item4b9250dd0e%3Ag%3AF9UAAOSwysBgezyU&nma=true&si=K8d9TyC8Oh2xSTeVmvyyvr82K0Q%253D&orig_cvip=true&nordt=true&rt=nc&_trksid=p2047675.l2557pokemon yellow is really simular to brand new us prices kinda odd imo that red & blue are far more valuable while pokemon yellow sold at the very least 50% less copies.
https://www.ebay.co.uk/itm/Pokemon-Yellow-Version-For-Gameboy-Special-Pikachu-Edition-/324559810597?hash=item4b9145b025%3Ag%3AXycAAOSwYHdgbcKp&LH_ItemCondition=1000&nma=true&si=K8d9TyC8Oh2xSTeVmvyyvr82K0Q%253D&orig_cvip=true&nordt=true&rt=nc&_trksid=p2047675.l2557italian copies and such have far less value sure. but if the language is either dutch english or french the value is usually among the top. even germany nowadays seems to be in the uprise since it's usually far more common over there if where talking lower but still high values.
well at least in general with the more normal collectibles
with say snes and nes French language is usually far far more pricy than Uk english version. with snes english are strangely enough usually not the most pricy option and where talking 50 or 100+ % price increase for cib copies.