Sadly I can see myself doing exactly the same with used bass gear purchases from the EU and just sticking to purchases from UK sellers going forward, to avoid the UK 20% VAT plus handling charges on used bass gear from the EU.
I've had several pedals sales to the EU over the past year - that will likely dry up too going forward. Why would anyone in the EU want to buy something from the UK if they can get it from another EU seller and avoid paying their local VAT rate plus handling charges?
I, for one, will certainly be making it clear on my sales ads so that potential buyers are aware of this point - frankly I'd rather lose a sale than see a fellow BC'er feeling they have been short changed.
I've just one 'significant' sales ad up at the moment and I've added this to my ad:
PLEASE NOTE: IF YOU ARE BUYING FROM OUTSIDE THE UK THEN LOCAL VAT RATES PLUS HANDLING CHARGES MAY APPLY - IN PARTICULAR FOR EU PURCHASERS FROM 1 JAN 2021