Amazon offers its Amazon Prime members the StarCraft Battle Chest for Windows and Mac for $9.99 with free shipping. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping adds $4.98.) That's the lowest total price we could find by $9. It includes StarCraft, StarCraft: Brood War, and two strategy guides.

Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months. (Note that there is currently a wait for the Amazon Mom program.)