I was able to find multiple Kindle editions on Amazon UK:

https://www.amazon.co.uk/gp/product/B00BKA4H6W

https://www.amazon.co.uk/Master-Margarita-Vintage-Classic-Ru...

and Amazon US

https://www.amazon.com/Master-Margarita-Vintage-Classic-Russ...

https://www.amazon.com/Master-Margarita-Mikhail-Bulgakov-ebo...

However I can't tell which is the 'best' version - some classics have appeared on Kindle full of typos or can be translated badly so you have to look for a good one.

true samizdat!

I have the english translation by Burgin and O'Connor, which is excellent. https://www.amazon.com/Master-Margarita-Mikhail-Bulgakov/dp/...