Is this a good estimate to replace an A/C blower and furnace? | Air ...

I live in a three floor townhouse/condo, 1,396 sq/ft. It was built in 1982 and has the original a/c and furnace which is horribly inefficient and is breaking down. Estimate reads as follows: "Remove existing furnace and air conditioning coil and also pump down outdoor condensing unit and remove. We shall install the following: one (1) Carrier 80% gas fired furnace. We shall match this furnace with a Carrier 2 Ton A-Coil. We shall then match the coil to a Carrier Comfort Series 2 ton condensing unit. All existing duct work will remain and existing electrical will remain. We shall also install a new digital, 7 day, programmable t-stat" Total cost: $10,500 Second proposal from same contractor is the same except uses Payne instead of Carrier equipment. Total cost: $8,957 Additional Details: Also, why are prices on equipment such a chore to find? I cannot find a website that just lists the prices of the equipment to see if this guy is on the up and up.

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