I used to get cases like that all the time, dirt cheap (or free based on my arrangements with them) Dell or HP leftovers from a mom-n-pop computer shop after customers declined to have a repair done or skipped out on the bill. Optical drive bay hung in front of mobo, HDD mounted vertical to save space, no front fan mount, often even proprietary smaller PSU or if not, only certain especially short optical drives would fit.
They were more trouble than they're worth, it is not worth the hassle trying to save a couple inches width, height, or depth, unless you are living in a van down by the river.
They also tend to be noisier (with aftermarket performance parts that need more cooling) because they lack sufficient mountings for 12cm fans, so you can't use good filter panels that rob some airflow, so you have dust buildup that's a real PITA to clean out in something that cramped. Often you can't even get the PSU out without taking at least the CPU 'sink off and usually any drives in the front bay(s), maybe memory, and more. Ugh, no thanks, been there and am not going back.
My best advise is if you want a full sized ATX rather than mATX, that you do not realize yet that you want a little more case room than if running (only) everything integrated on a mATX board. If you can run everything off a mATX, do it and then your case can be smaller still, but still big enough that you don't have to be surgeon to service it. Time flies by, soon enough you will want to upgrade and wish you had more space in your case.