DIY Perks has a great channel for many audio projects - have a look at his acoustic panels, DIY glass speaker or his guide on fixing headphones if you want to see more. In his latest video, he's designed a high quality self contained USB-C microphone for the cost of around $30 - with a built-in stand and amplifier. He provides all the steps needed to create the mic as well as a number of links and project reference files to put it together yourself.
You'll need a soldering iron and possibly a mini-blowtorch but it's an otherwise easy to follow tutorial which will result in a satisfying project to make. He ends the video by doing a direct comparison with a Neumann U87, as well as some other mics.
He has many other excellent videos on his youtube channel: https://www.youtube.com/channel/UCUQo7nzH1sXVpzL92VesANw
Matths gives it a workout
Self assembly too
Questions for the panel with Brie and Chris
The legacy returns