No Kelly's Blue Book for Carrier unit!? I am going to sell a 9-year old Carrier AC/Heat roof component....

I am going to sell a 9-year old Carrier AC/Heat roof component. It is 3 tons with a 12 SEER. It was used 4 years when I bought it unusual and has been stored within a covered garage ever since. It seem to be in excellent condition. What is the lofty and low value of such a piece of equipment if I were to flog it to someone who needs to replace their broken unit? I live surrounded by Central California.
Water leak into my vent and dripped into...
Answers:    It was used 4years then you could probably bring back about $1500 on the high side. Good luck.