@Truthseeker
I can't agree with that, in the Netherlands it is even cheaper than in Germany. After a very short search I found these suppliers from netherland. But of course it depends on the exact country for which you are looking for the substances. But to stick with the example country I found here some examples/suppliers that offer normal prices for the netherlands.
Example hydrochloric acid 1 liter for 13,92 EUR:
www.laboratoriumdiscounter.nl/nl/zoutzuur-5-copy.html
With this supplier you would still have to dilute the hydrochloric acid but the prices beat anything I have seen so far.
Example hydrochloric acid 1 liter (10%) for 3,95 EUR:
www.deoplosmiddelspecialist.nl/kopen/zoutzuur
And even at Hornbach there is hydrochloric acid at super low prices, although even that would have to be diluted again. But in terms of price, we are then in the super cheap range. (Whereby it is better to order it from a chemical supplier instead of a hardware store because there it is only technical purity.)
www.hornbach.nl/shop/Zoutzuur-1-l/8726938/artikel.html
The same applies to sodium chlorite.
Example sodium chlorite 20,33 EUR:
www.laboratoriumdiscounter.nl/nl/natriumchloriet-25.html
And in some countries it is indeed the case that the prices of both substances are enormous. As an example, I can mention Mexico, where a liter of hydrochloric acid or sodium chlorite costs over 500 USD on amazon and ebay. But here in Europe, I would be very surprised if the ingredients were so extremely expensive in one country and then almost given away in the neighboring country. Especially the ingredients for CDS are needed in all corners of the industry. That is why they cannot and must not be very expensive.