This is the 4308th most frequent Russian word.
аукционе
Auction.
In this sentence, "аукционе" is the prepositional singular form of the noun "аукцион," indicating the location where the action took place (distinctive for it involving a specific event or setting, like 'at the auction').
Я купил редкую вазу на аукционе.
I bought a rare vase at the auction.
Here, "аукционе" again uses the prepositional case to indicate where the items will be presented, emphasizing the event as a specific context.
На аукционе будет выставлено множество антикварных предметов.
Many antique items will be presented at the auction.
The prepositional form "аукционе" is used to specify the auction as the occasion of the transaction, with modification by "вчерашнем" pointing out the temporal specificity.