In the US, there're many such companies. Like Mobile Fidelity Sound Lab, which is selling its sound quality. Or Wounded Bird Records, which sells out-of-print titles. They all license the master tapes from the music companies (Universal Music, Warner Music, Sony Music, etc.) for a limited amount of time and can only make a certain number of CDs. No guarantee they can make a profit.
我收藏的經典粵語流行曲CD (now over 1,500,000 views - as of April 9, 2014)