Wow; those 3D models are really nice at least.
Although the price tag is hefty, considering the work that must have gone into the designs, I personally find the amount not to be excessive. Especially since after purchase, you'll be able to print as many as you'd like.
I'm immediately thinking of Dropzone Commander and Battletech; they're just the right kind of futuristic to fit within those settings, and the scale would be right on the dot as well.
Too bad that the resin-printer I pledged for has only a small footprint, or I might consider this offer; many of those buildings look like they'd be too big for it (I mainly bought it to print 28mm miniatures, furniture, fittings, doors, windows etc).
Still; with a cheap filament printer, this could well be worth it. Imagine a 6x4ft city table filled with these buildings...