You either have a keen eye for domains that others would want or you don't. Isn't that the heart of domaining? Picking locations others would want to build on in case you don't build on it first.
You can't think the way YOU want to think, you have to think the way that THEY think. Who is they? They is the market. They is the market that assigns value. Value happens over time. You can use comparisons to a certain degree. But it is based more on the other "C" called "Circumstance" and that can not be measured in this market or in any market.
Need, want , desire drive a market and value makes a market. Value is subjective because it is based on a need. That need has different levels of value. That need to a lemonade stand has one value. The need for a car manufacturer has a different value and probably greater value. So if you don't distinguish the two, you are leaving dollars on the table.