Led Zeppelin
* Estimated record sales: 300 million units (as of 2019)
* Total gross revenue: estimated to be over $1 billion (as of 2021)
Def Leppard
* Estimated record sales: 100 million units (as of 2021)
* Total gross revenue: estimated to be around $500 million (as of 2021)
Please note that these figures are estimates and may vary depending on the source.