Nobody expects a 1956 Colonial to be open-concept, buzzword, buzzword. In fact, some people like older style architecture. What matters to them is how well maintained the home seems.
The way they decide that is from two places. They look at the disclosures and their first impression on the walkthrough. It's all about how much it's going to cost them in the short term. That means you're better off knowing the potential shortcomings of your home before you even think about real estate agents and sales price.