Ebay UK offered a rare coupon code for 20% off when you spend £20 or more today but it is currently working on all ebay sites! The maximum discount is £50 but the amounts do not match the exact currency exchange, you may have to play with your order to get the coupon to work.
You may only use this code once per account but can check out with multiple items in that discounted order.
To get your discount, pay by PayPal and use coupon code CTWENTY at checkout by 7pm Eastern (midnight UK time). Shop early though, they may close the loophole allowing international sites to use the code.