you’ll pay their Paypal fees on the wheels + shipping price.
Then 20% VAT plus IIRC 3% import duty on whatever they put as the invoice price, plus the ‘courier tax’ referred to above which was around £8 when I got some.
So you’ll pay far more than the headline price on the website, so worth doing some numbers. Might end up cheaper to buy from someone who’s already done the importing like Zuus, ~£500 for a pair of deep sections and a UK warranty. I’ve got a pair of LB road wheels I’m happy with (well, I recently snapped a spoke and haven’t got around to replacing it yet) but not sure I’d buy again with so many re-sellers pretty much matching them on price, having wheels in stock (mine took a few months to arrive from the point of order), and with a local warranty.