Here is the 50 Vitas ayatan. With no stars it is only worth 450 endo. : r/Warframe
Steam Community :: Guide :: Endo Purchasing Guideline
The recent update streamlined the Ayatan Treasures menu : r/Warframe
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