If you buy, 3-5 licenses, it drops to $134 per license. 6-10, drops to $129.
And you don't need to purchase them all at once. When you order an additional license from your members area page it will determine how many licenses you have currently, that have current members area access, and then apply the discount.
So, say you buy 2 licenses now. It's going to be the standard price. If you buy a 3rd in a month, you'll only pay $134 for it.