Wine auctions are very specific and special in Germany and this year's are just about to start, with a COVID-induced difference.
Howard Ripley have a useful guide to German wine auctions, and list the important ones with these comments:
Bernkasteler Ring A group of Mosel growers, originally founded in 1899. They are lesser known for the most part, and bargains can always be found here.
Grosser Ring/VDP The most important auction, organised by the Mosel chapter of the VDP comprising some of Germany’s best estates, founded in 1908.
Rheingau Auktion/VDP What it says …
Nahe Auction/VDP This also includes...