What is the opinion of Reddit about the
Cherry G81-8040 POS Keyboard – 104 Keys – Magnetic Stripe Reader, Smart Card Reader – USB – Black?

Cherry G81-8040 POS Keyboard - 104 Keys - Magnetic Stripe Reader, Smart Reader - USB - Black

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A total of 1 review of this product on Reddit.

I think this is your best bet. I don’t think they use MX though. I think they use these switches.