Have you ever driven up to a restaurant and your first impression was disappointing? Perhaps the windows looked dark and gloomy, the façade was worn and unattractive or for some other reason it just didn't look like a tempting place to eat.
It could still be a fantastic restaurant – a real gem. But, your first impression has soured your anticipation. If you still walk through the front door, it will likely be with the expectation of being disappointed.
This scenario often plays out in the real estate market as well.
Imagine you're viewing a potential new home. You walk in the front door and are instantly impressed. You explore the property room by room and like what you see.
Then there's something you notice that's not quite right. An odour. You realize that it's likely cat dander and, now that you've identified it, you smell it everywhere. Suddenly the home doesn't seem as attractive as it did just moments earlier.
The owner of the property is probably so used to the smell that he doesn't even notice it. Neither does anyone else in the household.