Buying The Tree

There was a blond driving down a road and spotted at the sign that is on a tree next to a mantion that said $100,000.
She called the number and said :
- I want this item and i will send the money as soon as i get home.
Three weeks later she got a packege in the mail that had keys so she caled the guy and asked :
- What are the keys for ?
The guy said :
- They are for the mantion.
- The blond said :
- Wow, i thought that i was buying the tree.