24-06-2021 10:08 PM
It sounds like those items that are higher priced have Vat to add.
Starting 1 January 2021, eBay is required to collect VAT on certain orders delivered to UK addresses:
You'll see the VAT included in your order total at checkout, and you can view and download a tax invoice from the Order details page in your Purchase history.
On orders over £135 imported to the UK, the recipient may need to pay VAT as part of clearing the parcel through customs.