Does anyone has legit Windows 10 retail licence, preferably bought fro

I have edited the title for more clarity. As in original title, I only ask for Retail not VL edition.

I used a program called PID Key Checker. The key it shows is not the same one that my version of Windows 10 Pro has.

The computer I built has a retail copy of Windows 10 Pro (digital download) I bought from Newegg.

I'd like to buy second hand copy of retail, but I need to know first whether these are legit.

+1 for @Kyhi's ShowKeyPlus. I googled "ratiborus" and they appear to be heavily involved in illegitimate KMS activations.

What is the difference between product key and license?
A Product Key generates a digital License Key. A Product Key is disposable. Once it is enabled, you can no longer use it.

The program just mentioned and the ones I have tried are apparently just showing the License Key. It is generated from the original Product Key when Windows 10 is activated. I don't believe that there is any way to retrieve the original Product Key once it has been used.

I just bought a couple low cost licenses for Office Pro Plus 2019. The keys activated OK. However, I know that this version of office is only available for use with volume license keys. They may work fine for years or I may find them deactivated at any time. This is the chance I am taking.

The same goes for Windows, Office or other volume license program keys. You are just taking a chance when buying one of these keys. If you get one that does not work you have to hope the seller is honest and either gives you another key or refunds your money.

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NavyLCDR said:

+1 for @Kyhi's ShowKeyPlus. I googled "ratiborus" and they appear to be heavily involved in illegitimate KMS activations.

It seems that people are buying up volume license keys keys with unused licenses still left on them. They were probably legally purchased by some company at one time and disposed when they no longer needed them. Technically it violates Microsoft's licensing agreement for these keys to be resold that way. As long as they work nobody is going to complain.

Volume licensing:
Volume Licensing Key (VLK) - Products activated via a VLK key have to report back to a software license server once every 180 days. I take it that unless the product is reactivated at that time it becomes deactivated.
Multiple Activation Keys (MAK) - Products activated via a MAK key only have to do this once.

The difference is that activation done with VLK keys is done automatically using the license server computer while activation done with MAK keys have to be done manually one computer at a time. Both key types can use the same key to activate multiple computers depending upon how many licenses are bought for each one.

I work with a non-profit and have obtained MAK keys for both Windows Pro and Office Pro for them. I know these keys are valid because I obtained them directly from Microsoft's Volume Licensing Service Center.