This is not a case, but found some Maxsun motherboards being sold for cheap.
Here's one for the H81 chipset. Don't know of their quality, but I just heard of Maxsun as a GPU brand before, and not familar beyond that. There's also some being sold on eBay.
I sold my Asus Z97 board but since I still have a Haswell chip going unused and this budget board would be good enough. As Haswell ITX mobos get more rare to find, something like this at a low price point is good. Pity it has no rear USB 3.0 ports. However I can at least free up two of them with my keyboard and mouse over PS/2.