Wow $18?!! Javi you got them virtually free!! Our bird stand is one we made out of the sycamore in the back yard. It's designed so our birds can go to the window and has a platform. It's messy and crazy looking but Charlie loves it. The birds in the birds' room just has large branches of this tree in the room and they love it too.
I put branches of trees inside all the flight cages every other day. I wash the branch and leaves (assuring it is safe for birds), then I put it in their cages so it looks like the wild.