Here is the 50 Vitas ayatan. With no stars it is only worth 450 endo. : r/ Warframe
I used to buy lots of Ayatan sculptures. Not for the Endo though. : r/ Warframe
Ayatan Sculptures in Warframe: Where to Find, and Why They Are Needed
The Drop Rate of Amber Ayatan Stars Should Be Increased : r/Warframe
How to trade Ayatan sculptures to Maroo for Endo in Warframe 2019 Updated edition - YouTube
Warframe: How To Farm Ayatan Sculptures Quickly?
YSK: Ayatan sculptures don't all have the same value. Orta provides 57% more Endo per Amber Star compared to the most "expensive" sculpture: Anasa. : r/Warframe