Khaled, I meant in relative terms.
35m for Alves from 10 years ago was like 80m tiday for a Rb.
He was a world record.
Lenglet for 30 in 2018 is the same as 10m in 2006 or 15m in 2009.
For example, Chyngrisky was 25m or something like thaz, which is closer to 60-70m today.
So, in relative terms, Lenglet is an average/cheaper transfer.
If you are looking at absolute numbers without inflation, and without a year, then Lenglet is the most expensive signing.
Other recent transfer were actually more expensive than Lenglet's, when you compare them with prices from their era and player's age:
2005: Edmilson 10m, 28 years
2007: Milito 18.5m
2010: Mascherano 20-24m
Chingrynksy 25m
2014: Mathieu 20m, 30-ish years
2006: Thuram 5m for a 34 years old