Hi FoolishTech..
Here's the difference. A COA is NOT a license. It's an indication that you have a license. The only valid license is media and COA (and manuals, if applicable).
Only Microsoft OEMs are allowed to sell a computer with a license and a recovery partition, because they adhere to other legal and contractual obligations.
For more information see
http://oem.microsoft.com/public/worldwide/refurb/microsoft_refurbished_pc_licensing_guidelines.pdf
Please note, in particular, what qualifies as a refurbished PC:
What is a Refurbished PC?
A refurbished PC is a used PC that has gone through one or more of the following processes that leave the PC ready for use by a new owner:
● Data wiping
● Testing
● Cosmetic repair and/or replacement of defective minor PC components
Therefore, unless PCX is failing to protect the privacy of the clients according to privacy laws and/or properly test them to ensure that they are qualified for resale, the computers he's selling are refurbished, and thus in violation of Microsoft's EULA.
I admit that Microsofts Licensing agreements are very confusing and easy to cherry pick, but that doesn't absolve us of our duties to both them and our clients.