A very peculiar vehicle is on sale in Poland right now: someone converted a first-gen Audi A6 Allroad Quattro into a buggy and is offering the result for 20,000 Polish Zloty (4,750 USD at the time of writing).
The dashboard is pretty much the only identifiable part that remains of the original car; the rest has been changed beyond all recognition. That said, the original 2.8-liter V6 is still present under the hood and likely still sends around 174 PS (172 hp / 128 kW) to all four wheels through a five-speed manual gearbox. The listing is light on the details, unfortunately.
The bodywork got replaced with a tubular space-frame partially overlaid with modern-era Audi panels at the front and the rear.
Check out the videos for the creation process.