It is reasonable. However, that warranty sounds to good to be true. Make sure you read the fine print. Is the warranty limited or unlimited?would love everyone's input on whether the following quote is reasonable or not. i'm in northern NJ and have to replace my central air system. i've been quoted by a vendor a Carrier 24APA536 (3ton) Conednsing Unit and a Carrier FV4ANB005 ECM Variable Speed Air Handler for $7500. Comes with 10 years guaranteed parts/labor (no repair bills for 10 years). Thanks.