I found Nebula deals on Amazon that are actual discounts. There are some other Nebula products with "deals" on Amazon but their discounted price is basically the updated price that Nebula site gives so not really a discount.
1) Nebula Capsule (Black) - $299.99 + free shipping ($50 discount)
[EXPIRED] 2) Nebula Mars II - $449.99 + free shipping (after $50 discount coupon)
3) Nebula Capsule (Red) - $239.99 + free shipping (31% discount with code NBLA4MOM)
4) Nebula Prizm II - $189.99 + free shipping ($80 discount)
*discount coupon = coupon available on Amazon site