Vintage cars are on display before an auction of Austrian auctioneer Dorotheum in Vienna, Austria, on Aug. 26, 2020. (Photos: Xinhua/Guo Chen)

Vintage cars are on display before an auction of Austrian auctioneer Dorotheum in Vienna, Austria, on Aug. 26, 2020.

A vintage car is on display before an auction of Austrian auctioneer Dorotheum in Vienna, Austria, on Aug. 26, 2020.

The interior of a vintage car is seen before an auction of Austrian auctioneer Dorotheum in Vienna, Austria, on Aug. 26, 2020.

Vintage cars are on display before an auction of Austrian auctioneer Dorotheum in Vienna, Austria, on Aug. 26, 2020.

Vintage cars are on display before an auction of Austrian auctioneer Dorotheum in Vienna, Austria, on Aug. 26, 2020.

A vintage bus is on display before an auction of Austrian auctioneer Dorotheum in Vienna, Austria, on Aug. 26, 2020.

Vintage cars are on display before an auction of Austrian auctioneer Dorotheum in Vienna, Austria, on Aug. 26, 2020.

Vintage motorcycles are on display before an auction of Austrian auctioneer Dorotheum in Vienna, Austria, on Aug. 26, 2020.