As mentioned above 4Sevens changed the branding of their products and are now known as FourSevens (or something similar).
Therefore, many dealers had discounted the "old" 4Sevens stock in anticipation of the arrival of the "new" FourSevens products. That is why you are now seeing a lot of "out of stock" messages.
These listings will soon be removed completely, because there will be no more 4Sevens produced. Instead, there will be FourSevens flashlights listed on dealer websites. Although I have not looked, I'd be surprised if the new FourSevens brand wasn't already in stock by many sellers.
So if you were looking for the discounted 4Sevens stuff, it will be slim pickings. But as far as I know, there has been no change in ownership or production. That is, if 4Sevens appealed to you before, there is no reason you won't be happy with the FourSevens brand (or vice versa).