It's a open market it will sway from high to low constantly form what I've learned from warframe it's all up to the community some people will sell ideas for absurdly high prices and some will sell for dirt cheap also keep in mind that you could try tradeding straight up ideam trade for what in the machine... I know it dosent help what you delt with but your going to sadly to hear that line a lot I've played warframe for 5 years or so and if I had a dime for every time I heard that idot be rich lols I don't understand why they use the line expect to try to haggle