I know, I did give you a yes, was also just suggesting an exchange rate. 40 marks for 20 material would let you buy, at most, 80 material in a week on one character, and thats if you maxed out both your crucible and vanguard marks. Either way, the amount should be a [i]supplement[/i] to gathering materials, not a [i]replacement.[/i] I have had days where I have spent 3+ hours in total gathering materials, just to need more 2 days later.