For example E39 M5s are starting at around £25k in the Uk now. So with conversion rate vat duty vrt and nox your looking at about €45k cleared
But this would be less than €30 home and hosed
I found this offer on AutoScout24.

https://www.autoscout24.com/offers/b...campaign=share

Final price: € 18,500.-
Mileage: 220,000 km
First registration: 04/1999