CathInfo.com

The kings James Bible about $3.00

Douay Rheims about $70.


Catholic bibles and books are much more expensive. 

No excuses. 

I found a cheap one like you were talking about:
https://churchsource.com/products/nkjv-value-outreach-bible-holy-bible-new-king-james-version

Here's a Douay Rheims new for $30
https://www.amazon.com/gp/product/1935302027/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=1935302027&linkCode=as2&tag=httpwwwchanco-20 />

Here's a bad modern Catholic Bible for $11.89
https://churchsource.com/products/nrsv-catholic-edition-bible-holy-bible?currency=USD&variant=32599851630689&stkn=0537a4b57eb9


I'll attempt to give you some reasons/answers. Spoiler alert: the Catholic publishers are NOT evil, J--ish, or engaged in some greedy conspiracy to be "mean" to the poor or those on a fixed income.

1. There are a lot more Protestants than Catholics.
2. For the Protestants, the Bible is all they have. They have no need for Church Fathers, Saints, Doctors of the Church, or any other "Tradition".
3. Protestants also have minimal need for ministers, Catechism, or even going to church. By their own doctrine, each person can and should interpret Scripture for themselves. So they spend a lot more time in Scripture than the average Catholic.
4. Books are one of those things where the more you print at once, the cheaper each book gets. 100 books might cost $30 each, but that per-book cost might drop to $15 if you could order as little as 2,000 at once. Imagine the discount if you could manage to print 1 million at once. There are typesetting, proofreading, and other ONE TIME set-up costs associated with printing a book.
5. Printing in India and other third-world countries is cheaper than printing in the USA -- just like everything else.
6. There are various qualities of paper.
7. Since Protestants believe "Sola Scriptura" and "once saved always saved", they put a lot of their donations and "missionary budget" into mass producing and distributing Bibles, as if that alone does tons of good for the world.
8. Related to #7, it is quite possible that some Prot bibles are actually SUBSIDIZED by various non-profits and/or churches, with the aim of wider distribution. The Bible is like marketing for these churches. It's part of their marketing or outreach budget.
9. In a similar vein, where do Protestant church donations go, BESIDES the pockets of the ministers? Bibles. It's not like any money goes into stained glass, golden vessels and candlesticks, or statues. Most protestant churches are "functional" at best. When a protestant widow with a $50K or $5M house is bequeathed to her church, what could that money be spent on?
10. Catholics are more likely to have just one Bible for the whole family, and let's face it, it's more of a decoration. So more likely to be fancy, hardcover, so it looks nice on the shelf. Protestants have nothing else, so they read it every day, they get one for each child, and they wear them out. So they're interested in cheap/disposable "everyday carry" versions. There's not much Catholic demand for such a Bible.
11. Even the good Catholics who familiarize themselves with and actually read the Bible are likely to do it at home, where a hardcover would be fine. Catholics read the Bible where it's not going to get beat up. But Protestants want cheap, light editions they can keep in their car, read on their lunch break,  read in the city park, take with them to prisons to read to prisoners, etc. It's a whole different mindset.