Hi, I've got a 30" inseam and can easily flat foot the low seat (1993) k75, so i think it will fit you okay even with less inseam to work with. Seat height in itself isn't the end all on comfortably reaching the ground, also to be considered is how fat the seat is at the front. When it's wide, it will push your legs out more making in effect a longer reach to the ground.
On ABS, i wouldn't be stuck on that, rather find a nice, low mile, well maintained example and if it has ABS great, but if not you won't miss it probably. Personally I search out models without ABS for less complexity and the extra plumbing that comes with the system. Good brakes, and proper application of the brakes is key to survival in my opinion. Unless you plan on riding a lot in rain, or in icy conditions, probably isn't necessary. Good luck with your searching. scott
Edited to add pic, this is a stock low seat, really low, Just like my r100r Mystic, same height i think.
K75_090.jpg (72.32 kB . 768x432 - viewed 455 times)