Maybe so but there is nothing wrong with a 4 door, as a matter of fact a 4 door is much safer
Someone much smarter than I once disagreed with this statement, that being said the first car I remember was a 1958 Impala my mother drove and any true Chevy guy knows the coolest thing about a 58 is no such thing as a 4 door 58 Impala. In that era small children could open rear doors and fall out of moving cars. As a result, small kids are safer in the back seat of 2 door.
The seller would be smart to advertise the car in multiple places, so the car can be seen by a wider audience. Someone else suggested Facebook Marketplace and Craigslist, both are good places.
If it were me and I needed to sell it quick, I'd start with an asking price of $7,500 OBO.