Yveltal

UK sellers are asking wildly over the odds for this Yveltal—the cheapest of eight asks is £1.70, which is 8400% above the Cardmarket trend of £0.02. At £1.92, you're looking at the same sort of premium. If you're selling, you'll struggle to shift stock at these levels unless you're targeting uninformed buyers; if you're buying, check Cardmarket or European alternatives before committing.

• NotableUK buyers pay 8400% over Cardmarket for this card (8 sellers).