Burton ION snowboard boots

Selling almost new Burton ION snowboard boots with Boa closure. Purchased in January and used for five days in France. Size is 42, but will ideally fit a foot size of 39.5 or 40 (foot length up to 27cm). The boots are suitable for both beginners and experts, as the Ion model is relatively stiff (approx. 8/10), which makes it slightly more expensive than other Burton models. Price on Burton's website is 560 EUR. Selling because I need a half size larger. Will let go for 280 EUR (final price).