I haven't seen anyone talking about this online store

You’re right to be cautious — and this is an important topic because software licensing fraud is common, especially with very cheap Office/Windows keys.

When you see prices like $1–$5, it almost always means one of the following:

1. a) Volume/Enterprise Keys sold unofficially

Large organizations buy enterprise licenses (e.g., Office Professional Plus) in bulk. Those keys:

• Are not meant for retail use
• Are often tied to volume licensing services
• May be resold illegally by insiders or unauthorized sellers

Microsoft explicitly states that these keys are not for consumer use, and using them may violate the license agreement.

1. b) Unauthorized resellers

Some storefronts claim to be “affiliated with Microsoft,” but they’re not official Microsoft partners. They might be:

• Gray-market key aggregators
• Sellers of keys obtained through shady means
• Selling keys that will later be blocked or deactivated

Positive reviews can be fake or from users who got a key that worked initially but later failed activation.

Risks with these cheap keys

About Copilot + Office licensing

• Copilot features require specific Microsoft 365 licenses
• Enterprise (E3/E5), Business Premium, etc.
• They are not available with random cheap keys
• Office 2016/2019/Classic perpetual licenses do not include Copilot features

So if you bought a cheap Office key expecting Copilot or cloud features, you won’t get them — even if the key “works”.

Bottom Line

Those super cheap Office keys are almost never legitimate consumer licenses

They are typically:

• Volume keys (not for retail)
• Illegally resold
• Risky
• Non-compliant with Microsoft’s terms

Always buy from:

• Microsoft direct
• Verified authorized resellers
• Official volume licensing channels (if you’re an organization)

My answers are voluntary and without guarantee!

Hope this will help you.