I had one contractor give me a quote over the phone on 3 different units. All 2 1/2 ton units. I forgot to ask the SEER but assume its 13 based on the price. Of course I am waiting on more quotes and will confirm everything before the purchase but for now I have something to go on. Goodman - $3600 - 10 yrs on parts Carrier - $4200 - 5 yrs on parts Trane - $4500 - 5 yrs on parts