I am a collector and semi-retired dealer. You can contact me at email@example.com. Post-Brexit much of my stock has been or is being sold off at heinrich-koehler.de and grosvenorauctions.com
The Ukraine-related posts on this Blog have been edited into a book. Go to the Blog post for 22 April 2020 to find out more or go straight to amazon.com and type in my name.