It seems like cameras with decent sensors start around $500, though most cluster around $700+. I sort of wonder if no one has had the chutzpah to test whether there's a market for $500 webcams. I was personally a little surprised when I went remote three years ago that a "premium" webcam only costs $200, and looks like shit. Based on the number of people with fancy mirrorless setups now, I suspect a $500+ turnkey webcam could do well.
For your specific situation, a used Panasonic G7 and a $20 Chinese capture card would probably work if you're interesting.
For your specific situation, a used Panasonic G7 and a $20 Chinese capture card would probably work if you're interesting.