She works as an auctioneer at an 'auction house'. [=a business that runs auctions]
The house is being sold 'at auction'. = The house is 'up for auction'.
They 'auctioned' a similar desk last year.
(..) I'm gonna wear a polo dress. All right? It's simple, beautiful, elegant... Oh, but then again, I do have one of Nancy Pelosi's old pantsuits. I won it at an auction. Do you think that would be better? I'm actually just wearing my bridesmaid's dress. You asked Amy to be a bridesmaid, (..)2017 TvShow: Superstore Title: Cheyenne's Wedding Season: 2 Episode 20