When will the first walking robot be for sale?

The Earliest Seller, I believe is Japan, They have build more than 5 Different Human-Size Robots that Obeys to your Programming/ Commands, Rarely some can walk, they use wheels or Tank Tracks. So i will say in the next decade, because they are now fixing and learning the problems and making it better, after they have builded enough for them, they will need some money to supply the materials, so they will sell some for a MUCH higher Price than their's. Hope This Helps :)