Well, it depends on a lot of factors. Are the domains long established .com or do they dovetail with emerging trends in the market? Do they have high engagement

Well, it depends on a lot of factors. Are the domains long established .com or do they dovetail with emerging trends in the market? Do they have high engagement despite low revenue? Lots of eyeballs being poorly monetized by one party doesn't mean another would extract the same value. The valuation of a website, like any property, isn't going to be purely about the revenue its earning currently but about speculation about what could be made by interested buyers in the future, no?