Is this method of earning possible?

There are many people who need different domain names to insert links to their products, thereby increasing their own domain name authority, and I have contact information for many domain names. I act as an intermediary and earn the price difference. Is this approach feasible? However, I currently have relatively few resources, and I still need a large number of domain name resources that can be cooperated with.

There are many sites left though. So the demand has srunk considerably. To start right now fresh will be extremely difficult. Try something else.

I think it's feasible but you may need to do a lot of work to get it
really going.