Well, prices do differ. Wether we mean fish or hardware. And it's also a matter of where you'll live in Holland. In the western part of the country, prices are higher than in the eastern part of the country. But that goes for most things.
Like DoubleDutch has already stated, we do have an online platform called "Marktplaats" that a lot of people use to get their fish and stuff purchased. For that could lower the price even more. And it's a way to get in touch with other private breeders.
Discounters are good to buy your tanks and supplies in comparison to specialized stores when it comes to prices. But when it comes to fish, I'd recommend to go to those specialized stores and not to most of the discounters. But that's got to do with the quality of those fish. I've mentioned deliberately "most" for there are certain discounters that do order at the same wholesaler.
If you'd like to control the costs involved to set up tanks, you should be creative...
Some prices for this place
https://www.strijkeraquarium.nl/
Not sure how much these help.
I know Verduijn Cichlids. I went there once but I always meet up with them every annual edition of the Vivarium. They're just like me one of the steady exhibitors overthere.
Also Strijker Aquarium is a known store. But we also have other good specialized stores in Holland. But again, it would be interesting where you'll live in Holland. So maybe, we can point you to a closer store or even breeders in that area.
