During the cold open when Ryan is freaking out about the death of Smokey Robinson, Jim agrees by saying, "I second that emotion," to emphasize the fact that Ryan doesn't really know Smokey's music. "I Second That Emotion" is a 1967 song written and performed by Smokey Robinson.
Dwight guessing the price instead of realizing he's bidding on a silent auction is the same plot that happens in Friends when Joey accidentally placed a bid on a boat.
Despite Nellie being the official regional manager for the Scranton Branch at this point, she does not appear at the manager's office at the end scene of the opening credits.
The floral centerpiece on Table 5 at the auction (the table seating Jim, Pam, Oscar, Phyllis, and Stanley) disappears halfway through the episode without explanation. This is the result of a cut subplot featuring Phyllis and Pam arguing over who would take the centerpiece home. Phyllis ultimately takes it while Pam is away from the table, and when Pam returns and asks about it, Phyllis lies and says she threw it out (Pam doesn't believe her).