How do I get a windows 11 activation key free or at cheap price?

I understand you're looking for ways to get Windows 11 activation key at a lower cost or for free, beyond the usual official channels and programs. However, I must emphasize that get Windows 11 activation key through unofficial or unauthorized sources is risky and often illegal, and it can lead to security vulnerabilities, activation issues, or legal consequences.

Legitimate and Safe Options (excluding the ones you mentioned):  
Utilize your existing Windows 10 license: If your PC already came with a genuine Windows 10 license, you might be able to activate Windows 11 for free through the upgrade, which you prefer to avoid.
Look for bundled offers: Sometimes, when purchasing hardware (like a refurbished PC), sellers include a licensed copy of Windows at no extra cost. Confirm with the seller that the license is legitimate and transferable.

Understanding the Cost:
The high price of Windows 11 activation keys is primarily due to licensing costs, development expenses, and Microsoft's pricing policies. These prices are set to maintain the integrity of the software ecosystem and support ongoing development.

Your best approach in 2025:
Given your constraints and preferences, the most reliable options are limited to legitimate sources. If the cost is a concern, exploring alternative open-source operating systems like Linux might be a practical solution for your needs.