MRR program includes the ability to upgrade a license, transfer a license, create a new refurbished key, etc. It's based on a point system. Basically you pay for xx points up front and then consume them in various licensures. Having a COA on hand, has so far mitigated my costs. It doesn't always work like that, it's highly dependent on the build, manufacturer, original license, (if it was xp or vista...) and on top of that it changed again recently...



Anyways, the big point was...I wasn't reselling COAs by themselves, and if I buy again, I will make sure they are being sold with a cpu, motherboard or hard drive.