The Atlanta Falcons beat the Panthers 20-13 on Sunday, handing Carolina its first loss of the season in 15 games. With the undefeated campaign spoiled, resale ticket prices for Carolina's season finale this weekend plunged more than 40 percent from Sunday to Monday, according to listings on secondary ticket site TiqIQ.

The average TiqIQ price for this weekend's contest against the Tampa Bay Buccaneers dropped to about $270 on Monday morning from roughly $474 before Sunday's game. The cheapest asking price fell from $198 to $114 in the same time period.

Finding a seat at the Panthers' regular season finale may still prove difficult despite the loss. Only three tickets were available directly from the team on Monday afternoon, and the cheapest cost $250.