I’m personally not sure how it works. But when we were upgrading our bathroom, the tile shop added the VAT to the quoted sale price. I then asked a friend of mine who is VAT-registeted to buy it for us, and he got it from the same warehouse for the non-VAT price.
In fairness, they’d have to pay me to view their article. Not read, mind you, just view. I don’t think I could force myself to read their articles even if paid.