Quoted from Three60in:
Just bought a 80% for a 1000 Sq foot space this week for $1700 installed. Had the option for a 95+ for $2200. I use this guy and get a great price for it However the other quote I got was only $500 more either way. Still way short of $5k.
I put a brand new 95+ and AC in my 2500sq ft house. It was $5500.
Yep, About 1700 to 2000 is about what I charge for an 80%er installed. I've been in the HVAC business all my life and still am.
To bad your not in the Oklahoma City area.
...then again, I don't know what area you are in