Most homeowners usually find out once they have gotten sick or notices the coils on the AC have turned black.

In my specific case I was buying a HUD foreclosure and 2 days after I put it under contract someone stole all of the copper pipes and the HVAC coils.  

AC replacement around me is about $1600 for an A-coil and condenser unit installed.

He's recommending replacing the furnace with a new Lennox furnace and evaporator coil, for a total of $2287, 10 year parts and 3 years labor.Which would you select or would you get another technician out to re-diagnose the problem?

The kind with a coil wire, not the kind with a flat metal ribbon. 

The coils and 180 degree fittings are all fabricated from 10 foot pieces of standard black pipe, 

I just told mine that I would leave them coiled up at the alley and the came about 2 weeks later and took theirs off the building. 

Also where is my Tesla coil and free energy at?

A brand new electric coil stove costs about $400 on the bottom end and a gas stove not much different.

I think cities are in a coiled spring mode right now and will make a mega comeback in the summer.