For those of you looking for an inexpensive way to implement your favorite uav platform, I found this plane called the Mugi evo (shown above). The plane is built from twin wall polypropylene sheeting and is very cheap to build. After seeing the plans, I seriously think you could build this thing for under 20 dollars. As far as cheap planes go, its looks like it could take a beating. The plans are free to anyone who wants them, and can be found here.
I posted a video below for anyone interested in how it handles.