This somewhat mirrors my own experience starting domaining about 15 years ago. I've always stuck with dot coms and just picked interesting suffixes - domains en

This somewhat mirrors my own experience starting domaining about 15 years ago. I've always stuck with dot coms and just picked interesting suffixes - domains ending with cloud were very hot for a while. I do disagree about sites like Sedo not being a good place to sell - when people search for domains in their registrar, the similar results from sedo and others will appear in the list as available (at a higher price of course). Just having a landing page will simply list the domain as taken, so your potential buyers have to really want the name to contact you. Basically, don't rely on type in traffic alone - list buy it now prices on sedo and you'll move domains with ease