Changing my guess. In NBA games, the home team sits in front of Section 6 and visitors sit in front of Section 4. Resale tickets in Section 4 and vicinity are much more expensive and less common than tickets in Section 6 and vicinity. Higher prices stem from higher demand. I think that demand for tickets behind the Duke bench is likely to be higher than demand for tickets behind the Illini bench. Ergo, Illinois is the "home" team and you should sit in Section 6, where prices start at $918. Section 4 tickets start at $2,880.