OOOOh thanks for that.
Alpina was taken over recently by Citizen and altho they remain Swiss ( and will continue to do so) the distributors are different , so I reckon that is people dumping stock . At those prices they are losing money on each watch they sell.
Its a lovely watch and I'd be interested in buying it but they are £500 brand new on eBay at the moment.
https://www.ebay.co.uk/itm/Alpina-Alpiner-Black-Dial-Leather-Strap-Mens-Watch-AL525B4E6/253378996083?epid=16012077915&hash=item3afe90a773:g:YdoAAOSwlxRaYj0H
EDIT: Just found one new for £445 elsewhereonline.
Cheapest bricks and mortar I can find (Bucherer) is £520 new. https://www.bucherer.com/uk/alpina-alpiner-steel-black-dial-mens-watch-al-525b4e6.html