i had my heat pump replaced 2 years ago.it is a 2.5 ton ruud unit. i replaced the air handler and condenser.my local dealer wanted 4500.00 to do the job. i had a friend of mine buy the complete unit for about 1200.00 . being a former plumber i put the unit in my self  i paid someone to wire it and put a new thermostat on for less than 1800.00 i had a complete unit.you can see how much hvac companies GOUGE you . it is crazy how much they charge for there services.they literally have a license to steal from hard working people all in the name of  PROFITS. i thought plumbers were bad until i got a price from a hvac company. they had the nerve to offer me a 100.00 dollar off coupon  bless there hearts