I have a feeling I paid £2.14 for Desperado back in 1973. According to an online inflation calculator, that's equivalent to £25.47 today. 43 years later, I could buy a CD box set with the first 6 studio albums for £14.68 ie £2.44 each.
Suddenly, it makes sense how rock stars became rich in the 70s and why it's so much harder now.