These are sold to large companies for hundreds of computers. Sometimes, excess keys from these batches end up on the gray market. 2. Is Kinguin Legit?
Kinguin offers "Buyer Protection" (Kinguin Buyer Protection) for a small extra fee. If your key doesn't work, they generally replace it or refund you. 3. Will it actually activate?
Would one of those work for you?
The most common risk is that Microsoft will detect the key is being used improperly. While the key may activate successfully today, there is a possibility that months or years later, Microsoft’s servers will flag the key as "volume license abuse" or "hardware mismatch," rendering your Windows copy non-genuine.
Since you are buying from a third-party seller, there is a chance the key you receive has already been sold to someone else or is a duplicate. If the key is invalid, you will have to go through Kinguin’s dispute process to get a refund or a replacement.
You are building a budget gaming PC, don't mind that the key is tied to your motherboard, and want to save $170.