It depends on the price set by the manager, there are exceptional posters that are on a $ 50-a-week campaign and there are campaigns where the average Hero gets $80 or $90 every week, it depends on the campaign where a hero wants to join
so its $50 to $100 based on the campaign, mixing campaign gets the best rate for a hero account,

But if you're going to rent your own signature space you will have to check your reputation and your value here in Bitcointalk so you can set a more realistic price.