Paying for ministry

I am running into Reformed Christians, that believe any book, Bible etc.., that is meant for ministry purposes, it is wrong to charge for.
Here are a few examples of this.

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Person A: I am having a problem with X and I am wanting to know more of what the Bible says

Me: Oh, this DVD is good, and this book has also helped me. Oh...but it costs $20 and this thing costs $10/mo

This should not be the case in biblical ministry. To put a paywall in front of edifying the church and preparing us to be a witness to others is antithetical to the teachings of the scripture. We are to freely give, just as we have freely received in ministering to one another. I feel dirty now when I have a good recommendation I want to give that is a resource from a brother who is charging $$, even if that fellow heir had good intentions.

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I've realized it is an American, capitalist-driven idea that has invaded the church. Capitalism is fine and all in a secular economy, but it isn't for the Church

I gave just a few examples and I could give a few more.
However, it is clear they believe that it is wrong to charge for books that are meant for ministry purposes. Regardless of if the book is by great authors like RC Sproul, etc…

I gave some push back, saying that I am not for overcharging for books. However, they are not cheep to produce. Which includes quite a few things, including paying wages.
I also said that when I read a book that I believe might help someone. I often gift that book to the person.
By the way, this is also a shot across the bow, of some ministries they like.

So far, everybody disagrees with me.

Thoughts?