I already did this.
About on July 15 Rebecca mentioned ability to to choose from several delivery options to Russia:
Normally the shipping charges depend on the shipping method. You can try to select registered mail an see if it will be cheaper with that option.
I was able to choose like $8-$13, which is acceptable, but payment by a credit card did not work.
She told they will fix payment by CC and they actually did by adding Stripe gateway now, but now shipment became almost $100 again :(, the choices of delivery methods I was able to do on July 15 disappeared again as before July 15.
How to get $13 USD shipment (registered parcel with insurance) and payment by CC at the same time?
Is it a good practice of switching on and off affordable shipment methods only like for a teasing?
Is it a secret information not available to public regarding to warranty terms?
I ordered PRO2 and received it successfully two years ago, it costed me about $8 or less to ship.
Now it is $100 USD, what happened?
Today even the most reliable and popular forwarding services (Germany -> domestic Germany Forwarder -> Russia) would not take more than $30 USD and they can add an insurance just for 3% of the order cost which is about $2-3 more, that is still 3 times less in total than outrageous $100 USD just to ship and smaller forwarding services can do it even for twice less than big forwarder which is about $15-20.
I am OK to go with a big forwarder shipment cost with their insurance (about $30+$3=$33).
What about your warranty in such a case?
I need to know in advance your warranty and replacement terms if shipped by forwarding carrier or your $13 USD shipment (registered parcel with insurance), I was able to choose this rate only on a single day about July 15.
I can get the latest revision of Yubikey 5 for only $60 in Russia (+ $5 for domestic shipment) with a full 1 year warranty (item with hardware defects can be easily replaced for free of charge during the whole warranty period) and even a free replacement of working item to a newer revision if Yubico finds a significant security bug in their non reflashable firmware.
Your $50 NK PRO2 or $70 NK HSM2 + $100 for delivery looks like a significantly non-competitive offer only because of its total cost, though the cost of the items themselves without delivery are fair.
Almost any shop ships such small items worldwide for only $10-20 even today in spite of COVID 19, etc.