A proper family house beside a one dollar price makes no sense, so you need the catch. The sign repeats the figure the title already gave, selling the same idea twice. The gap between house and price still carries the click.
How the packaging works
Title
The title makes the impossible claim in six short words.
Thumbnail
The image shows the real house with the same dollar figure on a sign.
Remix this
When a true number sounds broken, show the thing and the price together in one frame. Keep the number in one place, image or title, and spend the other on the catch.
The transferable lesson
Impossible price beside the real thing sells the catch
What to avoid copying
The same dollar figure sits in both title and image. Give one surface a new job, like hinting at the catch.