You don't need to add VAT if its within the EU as you are not a business buying them in and selling them to the public.
How about a picture of your S9 with a piece of paper with your forum name and date written on showing you actually have what you are selling. Maybe you'll get some interest then

I know - that's why I see this odd.
How about buying brand new one directly from Bitmain:
Antminer S9-13.5TH/s...at least you know why you would pay VAT
