Yesterday I noticed that the outlet store had nothing for sale, but a few days before it had a lot of stock. I imagine that the lenses/cameras/etc that were there earlier will reappear (hopefully during the sale).
Though I've noticed in the past, that Olympus seems to limit the gear in the store during the sale, and after the sale all of the normal gear is back. I don't remember the details, but I don't think the cheaper gear (i.e. the 17mm f/1.7 lens, the 12-50mmf/3.5-6.3 lens, the 40-150mm f/4-5.6 lens) was offered during the sale. On the big ticket items were offered.
And of course, the quantities are limited. I was trying to buy a FL-600R in the past, and it was sold before I could get it in my cart.
I have been toying with getting the 12-200mm f/3.5-6.3 lens as a companion to my E-m5 mark III.