They were in service until 2016 and offers are now open.On Friday, May 6, 35 subway cars that were built in the 1930s and 1940s will be auctioned. With a base price of $600,000 per unit, the proceeds from this sale will be reinvested in the network by Subterráneos de Buenos Aires.However, this is not the first time these cars have gone on sale.In February, ten were auctioned off at a record price: they paid an average of $2 million for each one.What will they be used for?At the auction, wagons can be bought by both companies and individuals.In 2017, Hard Rock Café acquired several to make a restaurant.Other buyers transformed them into a home and there were those who used them for tourist lodging.There are also transport fanatics who are looking for them to add to their private collection and who have chosen them to be a library.Individuals or companies that are interested in participating must register on the website superbid.com.ar, where photos of all the cars for sale are displayed.There is the option of coordinating a face-to-face visit to examine the wagons in one of the places where they are stored: the Barracas neighborhood and in the Buenos Aires towns of Chascomús and Mariano Acosta.The schedule arranged is from 10 am to 15 pm.On offer are 35 Siemens Schuckert wagons manufactured in 1934, 1937 and 1944, which circulated for years in most of the Buenos Aires subway lines.They measure 17 meters long by 2.6 wide and are 2.3 meters high.Each one weighs 31 tons.