Windows 8.1 Serial Numbers as seen in Tek's video described below

In Tek Syndicate's video: at the time 10:50, it talks about serial numbers for about $13, and I would really prefer this to paying $100 for the code.  

Thanks for your help ahead of time!

Plenty of people have them in the Buy/Sell/Trade section, take a peek there and see what's being offered

is one place.

my friend has worked with /u/s5ean directly. Maybe send him a PM