Almost certainly a bitza, and I suspect it has a very odd back end as it looks a bit like a cross between a beetle back and a barrel backed car. No rear photograph though so a bit hard to tell. While a lot of odd things were done, I also doubt the engine is original either.
Price is low too, which in itself suggests the car has a few oddities.
Headlights are not a pair, drivers side reflector is yellow ish
and the passenger one is blue ish.
Windscreen is very odd. Never seen one like that on a twin, ever. A bit like a windscreen on a F type - but not quite.
Bracing is odd too, no upper reaction rods and two rods per side on the bottom.
As the numberplate is on view, if one has any interest, best to contact the MTWC registrar and see what it has in the records.