Maximum $300 off Xbox One X w/ Qualifying Trade-In (Gamestop/Microsoft Store)

To get the max $300 you must trade-in a PS4 Pro.
The link I provided is to their weekly ad, as these transactions must be done in person; the information for this deal can be found on Page 6 of the linked ad.
Here is the breakdown of discounts with your trade-ins:
$300 off the Xbox One X (Total is $199 + tax):
PS4 Pro
$250 off the Xbox One X (Total is $249 + tax):
Xbox One S, PS4 (any kind), Nintendo Switch
$200 off the Xbox One X (Total is $299 + tax)
Xbox Original
Special Requirements:
-PS4 & PS4 Pro: Working condition console, AC cord, working condition PS4 controller, charging cable for PS4 controller, any HDMI cord (per Gamestop associate, OEM HDMI cord not required. YMMV at Microsoft Store)
-Xbox One/Xbox One S: Working condition console, AC cord, working condition Xbox One S controller (no batteries needed), any HDMI cord (OEM HDMI cord not required. YMMV at Microsoft Store)
I am actually going to trade in my Xbox One S right now, so I will let you know if the tax paid is on the full price or the discounted price after trade-in.
https://www.gamestop.com/weeklyad (Page 6)
Deal ends August 28th, 2018.
EDIT: Thanks to sa.guly10, we have a possible YMMV addition to this trade-in offer. On page 2 of the weekly ad, it says starting on AUGUST 10, 2018, you will receive a free game valued at a maximum of 59.99 with the purchase of any xbox console. As of yet, I am unsure if these deals are able to be combined, but I am going to wait until the 10th myself to find out. Chances are it will NOT work, as the small print on the same page says "Offers cannot be combined with any other offer or discount."