How much would these Arcane helmets be worth?

[Telekinendo]

http://warframe.wikia.com/wiki/Scorpion_Ash_Helmet

http://warframe.wikia.com/wiki/Aurora_Frost_Helmet

http://warframe.wikia.com/wiki/Essence_Loki_Helmet

http://warframe.wikia.com/wiki/Thrak_Rhino_Helmet

http://warframe.wikia.com/wiki/Hemlock_Saryn_Helmet

http://warframe.wikia.com/wiki/Gambit_Vauban_Helmet

I'm kinda tired of having their BPs in my inventory and need some platinum, and I get wild variations on price when I rarely get people to message me. Usually between. 20 and 50 plat for all of them, and I kind of feel like that's a bit of a ripoff, but hey I don't know maybe it's not.

[StrawberryShortcake]

You'll need to craft them before you can trade them AFAIK. 

You can reference Warframe Market for the prices but take it with a pinch of salt as many are asking for exorbitant rates.

Good luck with the sale!