adding my few experiences.
lets take a simple example, a person is driving a mercedes C240 (2003 model year) which was sold by shahnawaz motors ltd, Now lets take into consideration that the one of the transmission speed sensors failed and caused the unit to malfunction and go into limp mode.
The electrics kit for that transmission is available from MB (even globally) and their repairs can be carried out to bring back the car to 100% service quality (please pay attention to the 100%).
Lets take your CVT unit - lets say the torque converter apply clutch has failed internally and has pushed a lot of debris into the transmission itself - Does your manufacturer supply you with "new" repair parts or are you flying by the seat of your pants claiming that every part on any car should be sourced from scrap yards.
If you try to service such repair with scrapped parts - where do you account for the 100% that is required in transport medium.
There is a place for scrap parts - mostly being dead parts like door assemblies, metal castings, stampings etc. If you are trying to buy "wear and tear" replacement parts from scrap yards then this discussion is already over.
Lets take PCs for example, If your PC keyboard fails, do you buy a new one or you buy an "imported one from scrap" please bear in mind that a keyboard traps a lot of dead skin and other things like (e.g. old user had a deadly contagious disease - or just consider if the old keyboard was in use on a nurses mobile computer in a hospital - or it maybe owned by a person who loved to watch ****).
I hear a lot of horror stories of people who bought a more expensive brand car and got to pay for the neglected maintenance from the previous owner.
e.g. person owning a mercedes says - yeh itni mazboot hoti hain ke 12 saal se koi kaam nahi karwaya, sirf aail aur filturr change, service station dhulai ke saath. No doubt they are durable as hardened steel tools and they go bad so slowly that the owner thinks its OK, But they do go bad and do require repair and maintenance.
Some misinformed person bought it and got to face a 800-1000 euro parts list to "catch up" with the maintenance that the old owner missed - because - chalti ka naam gaari.
Any machine is great when its backed and supported by the manufacturer. You can break it down to the simplest cases even including household appliances.