It's cheaper just to buy the hardware from China and install their OS on it. They overcharge for a lot of their products including their mini pc which you can just boy from aliexpress and install coreboot on it for way cheaper, https://www.alibaba.com/product-detail/New-Top-mini-pc-i7-10....
Depends on the product. Purism doesn't only sell existing (such as servers) or modified (such as minis) hw designs, but also completely original ones (such as phones).
True, but they're also outdated hardware rise. They also sell a service for "aweSIM" which is suppose to be a privacy sim card, but they literally just sign up for you and then overcharge you. Better to use a MNVO like US Mobile and giving them fake PI.
Selling something with a markup is how business works. It's up to consumer to decide whether the added value is worth the markup. Seems like it's not for you.
As I mentioned elsewhere in this thread already, while the Librem 5 is becoming dated, there's still no upgrade path on the market. You need to switch to a completely different category of devices in order to get something more performant than that. I hope that'll change soon, regardless of whether it will be Purism coming up with L5v2 or someone else with their own thing.