you kind of have to be a little more specific....
brand, style, wattage....
we have a guy here in Jersey that has a "WAREHOUSE" with a variety from vintage to newer units....
he works on them and has parts as well.....
just a hobby he does from home since he retired from HVAC....
I dont think he will ship anything though.....parts maybe, but not a whole A/C
but you should see the warehouse in person....models I never knew existed, or before my time....
otherwise keep searching on CL, OfferUP, FB Marketplace and such....they do turn up from time to time...