why am I paying VAT on second hand parts?

[porscheparts911]

Why am I being charged VAT by eBay when I sell secondhand parts 

[red_magpie]

Are you sure you're not just seeing the VAT that is payable on eBay's fees?

There are some circumstances now where eBay charges VAT for HMRC, but even where this applies it's payable by the buyer, not the seller: https://www.ebay.co.uk/help/buying/paying-items/paying-tax-ebay-purchases?id=4771&st=12&pos=3&query=...