$40 each
Plus $200(?) shipping from the UK. How much does a pair of calipers weigh? 25 pounds? Unless Her Majesty's Royal Mail has a flat rate international box for those things the freight costs will be high.
Last pair of calipers I shipped I used a USPS flat rate box that ran about $15. The postal employee at the counter gave me a really dirty look when I plonked that box down. USPS probably lost money on that shipment.