This classic wood tree house set by Melissa & Doug originally retailed in Canada for $199. It is a fantastic toy with lots of years of love and adventures left in in.
This wood tree house is not longer made but all the classic wooden figurines and accessories are still available and the tree house is built to scale with the dolls.
Here is a site in the States that does have some in stock:
http://www.overstock.com/Sports-Toys/Melissa-Doug-Classic-Wooden-Tree-House-Set/3164427/product.html