-8&ks=960&sc=Global&list=y&usc=All Categories&type=page&id=pcat17071&iht=n&seeAll=&browsedCategory=abcat0711000&st=categoryid%24abcat0711000&qp=&sp=%2Bcurrentprice skuidsaas
Posting this "deal" as well as offering a PSA about the eGuides.
I was unaware that eGuides were discounted as part of the GCU program; physical guides don't apply an additional discount for GCU. It seems only some eGuides are discounted further with 20% off though.
Best Buy's math on for eGuides normally $9.99 x 50% off = $4.99 x 20% off = $3.99
Some notable eGuides for $3.99 w/GCU:
Witcher III Wild Hunt Complete Edition [bestbuy.com]
Elder Scrolls V Skyrim Special Edition [bestbuy.com]
Super Mario Odyssey [bestbuy.com]
Bioshock - The Collection [bestbuy.com]
eGuides may be more useful as you can use these on a tablet/phone.