We prioritize buyers even during negotiations. Thank you for your understanding. Immediate purchase is also welcome. Please note that I may not be able to respond to comments immediately on weekdays. Unopened, unused item Model number: KAC017A4 Replacement air purifier filter (pleated filter) Set of 5 High-performance pleated filter Compatible with many models. Applicable models: (2009-2010) ACM75K*, ACK75K*, MC75K*, MCA75K*, MCK65K*, MCK75K* (2010-2011) ACM75L*, ACK75L*, MC75L*, MCA75L*, MCK75L* (2011-2012) ACM75M*, ACZ65M*, MC75M*, MCA75M*, MCZ65M* (2012-2013) ACM75N*, MC75N* (2013-2014) ACM75P*, MC75P*, MCA75P*, TCM75P* (2014-2015) ACM80R*, MC80R*, MCA80R*, TCM80R* (* indicates a 2-4 digit number, symbol, or alphabet)