Alright so this does require a bit of work to accomplish, it took me all of 5 mins to order the GC's and I enjoy this kind of deal hunting, so forgive me if it's not your jam.
But cardpool has Nike gift cards for 10% off, I bought 8 x $50 cards for $45 each, and then I jumped on the Swych deal for buy $50 and get a $10 card for free.
All that was left at the register including all tax was $7.67 + $410 that I had spent on the gift cards. For me this saved me $50, since tax in NY is kinda on the high side.
Additionally, if you're in the NYC area, all the Nike stores have tons of the apple watches, apparently no one thinks to check them out and are only going to Best Buy, Apple, etc ...
You could also stack with a CB side to get 1.5% of it CB as well.
The Cardpool GC's showed up in my inbox within the hour, however sometimes they do take a few hours to arrive.
Note per Nike.com terms, you can use up to 10 GC's per order, I hit 9 with mine.