On sale? Or retail? For retail (or for slightly less), it's definitely buyable, easy peasy. But if you are hoping for a huge discount, you can forget about it... I haven't ever seen these jackets for with a significant discount, just some clues that they were for sale (but my guess is that stores had like last one and they wanted to clear the stock).
Speaking of Everest Parka- I just received mine. This jacket is simply superb.. I got size 48 which still is very big and fits me nicely, maybe size 50 would be a bit better for that oversized look, but 48 still looks great. There are few things I didn't know about, like that there's an elastic cord you can model in the hood, you can shape the hood as you fancy. The jacket is also very lightweight. One problem is that the hem and cuffs tend to change the colour to the color of the garment they are rubbing against. So the hem on the inner side gets dark if you are wearing the jacket with jeans. Well, no biggie and I hope it's washable.
I will post some fit photos later on. Just a heads up- if someone is thinking about getting one of these jackets, go for it. It's a stunning piece which I hope I'll wear for next 10 years.
By the way, I don't know if you've seen the video of Nigel talking about the Everest Parka- he showcased a new one and a 9 year old one. The 9 year old was sooo beautifully faded.. gave it that extra vintage look. I hope my jacket will fade in the same manner.. damn I can't find the video but it has been posted at youtube.