AMD first entered the CPU market with reverse-engineered Intel 8080 clone 50 years ago — the Am9080 cost 50 cents apiece to make, but sold for $700

https://www.tomshardware.com/pc-components/cpus/amd-first-entered-the-cpu-market-with-reverse-engineered-intel-8080-clone-50-years-ago-the-am9080-cost-50-cents-apiece-to-make-but-sold-for-usd700