Just an FYI.
From now until Jan 2, NS Deluxe (for 5 PC's) is on sale at Newegg for $22.99 with promo code. This is the lowest price I've seen and maybe what you've been waiting for. The days of $0 with rebates I fear are no longer with us.
(The promo code I see is EMCKNNX46 with todays Newegg email promotions. Not sure if it works for everyone.)