Returning Veteran Player, want to sell helmets no clue on price

[Quorinus]

I started playing warframe quite a while ago and as a result of that have some arcane helmets in my inventory, I was still playing when they were made unobtainable however it's been around a year since I last played and have no idea what the prices are. There doesn't seem to be a lot of updated info on the prices of arcanes and I just want to make sure that if I do sell any of them that I don't get jipped.

Edit: This should be all of the arcanes I have 

Edited April 8, 2017 by TheShadowfoe
Adding images for clarity

[AerinSol]

All I know is that Vanguard Rhino was the only one that went for 300+plat and Pendragon Excalibur 250+. But since the Parkour 2.0 it doesn't seem worth it and the latter is more expensive with his 4th.

[armedpoop]

Use Warframe.market for up to date pricing. 

[(PSN)maso_sage-mode]

the old arcane helmets are really worth a good amount of plat. dont sell em for cheap ! 

[PrVonTuckIII]

If you have a Mag helmet in there that you don't want, call me up.

[AerinSol]

Updated images:

*bites lips*

That squall helmet! Don't sell it for any less than 300. Unless you are fine with me giving you everything I've got. A mouth watering 6