Seller credit for AC needing service

wanted to get some opinions. I own a home in New England. I am in the process of relocating for work to VA. will be moving rather quickly and we are already under contract and closing on a new home end of may. Planning to list our home in the next week or so.

however much to my dismay something is wrong with the central air and it’s an aging unit that I’m betting will be a needs replacement. Had a couple of hot days last week and it definitely felt like the AC wasn’t cooling very well… kinda glad in a way it happened now so at least it’s not something we are finding out during a buyer inspection which would seem shady or something

I’ve replaced all other major mechanicals in this house during my 5 year ownership as they were all aged and i had failures

septic, roof, well pump, hot water heater have all been replaced within the last 3 years. I’ve gotta be honest I don’t blame a buyer for wanting AC. but I don’t want to deal with the replacement. I just want to sell the home and move on lol. would it be reasonable to just disclose this and offer a credit at closing to offset the cost of replacement? Or simply negotiate the offer down on the house?

any input or recommendations are welcome. Thanks in advance