Nikolai has been very easy to deal with and communicate in English. Since he does not accept PayPal (probably because of very restrictive PayPal policies) I had to use another payment method. I have opened TransferWise account and it has worked well from there. Because of Covid-19, the shipping has taken almost three months but this has nothing to do with the seller. My shipment has been stuck in Moscow airport for very long time.
When the product has finally arrived, everything has been in good order. Undamaged packaging, accurate product description and long expiration date. It is good until April 2023 so I am happy. I cannot tell how good it is as I have not taken it yet. I keep it just in case I get sick while traveling.