3d buildings models and textures (modern style)

Hi

I am looking for models of cities or just buildings, in low poly to use them in Unity engine.

The ideal would be a rip of the buildings in gta4 and similar games; I am trying to get all the buildings in modern style, so no fantasy or cartoonish stuff.

I have some models from arteria3d and dexsoft, but they look so different from each other that is hard to make some sort of consistent style.

I've seen some nice models on the unity store, and I was wondering if anyone got them (they are collections of urban/modern buildings, quite expensive).

Does anyone have (or can point me to links), either the gta4 models or other low poly building models?

Thanks!