It's instock on their online store according to the link.That laptop checks pretty near every box except for being out of stock.
Also plenty of others have stock but I buy from Umart, they are local and competative and there when I need bits and bobs urgently. it seems to be a model selling quick. https://www.google.com/search?client=firefox-b-d&q=D509DA-BR208T which doesn't surprise me. Not many 15" models have dual drive option for that price from my experience.