It sounds like you're describing a 3BHK flat that is available for sale in a prime location. Here's a more polished version of your description:
3BHK Flat for Sale in Prime Location
We are offering a spacious 3BHK flat for sale in a well-maintained building located on the main road, offering easy accessibility. The property is unfurnished, providing you with the freedom to design the space as per your preferences.
Key Features:
This is an excellent opportunity to invest in a prime property!