Idea Validation: Selling domains in 2023

Hey everyone! I've recently acquired a few cool domains and it got me thinking, can this become a business? So I'm tinkering with ways to validate this idea. I've created a Google Sheet in the meantime and plan to manually do everything myself. If things look good, I plan to automate everything. Feedback would be greatly appreciated. Thanks!

https://docs.google.com/spreadsheets/d/e/2PACX-1vTslS8KdU8RtrlMkfF-98cp_yQXV0tes9XS2TiGPyBdyTp-7z2KVpeDaXZ1CwaU6dz54F0z0FFFUxVa/pubhtml