[Chainmail]

Is their an aerodynamic engineer in the house?

1. The vehicle in the e-bay ad is a more-or-less ground effect machine that probably doesn't work: the construction appears to be pretty good and those wing fences are their to control the flow of air over the wings but it is likely to be unstable in the roll axis anyway, if it has enough power to get off the ground at all. And no, it doesn't have a TBF canopy..

2. The "Air Force Saucer" in the photos has no powerplants and no visible control surfaces. Attractive but would not work, Keemo Sabe.

[Yosemitest]

I'm not an "aerodynamic engineer" but I've taken both aircraft aerodynamics, and aircraft performance courses, and have a B.S. in Aerodynamics, but my major is in Air Traffic Control.

There is some doubt about those flying photos, posted here.
Don't be in too much of a hurry to dismiss it.