For the right buyer, a luxury home with an unusual feature—a circular floor plan or a dramatic cliffside perch, for instance—can lead to love at first sight. But in marketing a singular luxury estate to an increasingly global and diverse audience, highly distinctive attributes can be challenging to present in just the right way. Comparable sales, or “comps,” which are used to determine the value of a property, are sometimes difficult to determine for a residence with unique characteristics. For this reason and many more, it’s crucial to seek the guidance of an expert who knows both the local market for a particular house and the international market for homes of a particular type.