The Royal Mint has now released the mintages for the strike your own coins for 2019, which means we aren’t far from 2020 figures.
Make what you will of it of regarding the politics, design of the coin, business model of the Mint, but there are two strike your owns for the Brexit 50p. Those done for two weeks in February and one for 31/01/20 - random Friday not in school holidays.
The Harry and Meghan wedding coin (for one day only) had a mintage of 508 whilst the Snowman 50p had a mintage of 700 and ran throughout December! Both attract decent sale prices on the Bay!
I’m guessing when the Brexit 50p mintage figure is announced we’ll have similarly pretty low figures! You can currently pick them up for between £15 and £25.
DYOR