[Piotrsko]

Heat pumps you pay for freon type used and packaging the components. Sometimes really high efficiency scroll compressors. Freon type determines how cold it will still extract heat..they were all within say 10-20% of each other. Other part of the install is how much you are paying for your dealer choice. That is half to 2/3 of the install price.

Mine could be bought for $5,000, came with enough freon to run 40ft of line. Has really odd flares, requires special inspection from county permits. The remaining $15,000 was moving all the ducts to a new transfer box and disassembly to get parts under the house then reassemble. concrete access hole is 14x 14 x24

Bicycle might be a bad choice as there are hundreds of choices to make for options and skill of maker getting it just right. Yes there ought to be not much change between a Schwinn and a Huffy, and those prices are similar. Both were a fraction of the bike my son rides. They measured everything, there's not much adjustable and although I am approximately the same size, his bike is uncomfortable as heck for me to ride but he does 100 mile trips