1. Sisters
have ephemera, 250plats.
https://warframe.market/auction/650ac859ea6980043fa38cef
2. Lich
1)
have ephemera, half-masked, 200plats
.https://warframe.market/auction/650ac8f2314e700612f2ca4b
2)
no ephemera, Skinhead, 175plats.
https://warframe.market/auction/650ac99bb0b39004860789de
3)
no ephemera, half-masked, 100plats.
https://warframe.market/auction/650ac9d8314e70060c338174
4)
Full-Helmet. just 75plat.
https://warframe.market/auction/650aca284ba9fc06228313be
If you want buy these items, find TheOctavius in-game or market.