Here’s a bike I hadn’t heard of before – the “Sachs-Nauder.” Per Sheldon’s EMU, these were built by Nauder (the French importer for Sachs) between 1981 and 1986.
They made an enduro and a MX bike with Sachs 125cc and 250cc engines – according to a period advertisment the 125 made 30 hp while the 250 made 39 horsepower in the MX bike.
The seller thinks this might be the only SN in the US – I have no idea if that’s true or not but it sure looks like the seller’s asking price is based on the rarity. Find this Nauder for sale in Harrisburg, Pennsylvania for $20,000 or best offer here on Facebook Marketplace.