I've bought all the PC versions of GTA till date, at the same time pirating them in the first place. This franchise lays out so much groundwork onto an open world, if you play it right, there's a lot to discover and do. If you blaze around in fast cars shooting people and evading cops, yes not much to do. Open world and multi-player is a bad combo for such purposes (if you wanted to shoot around, you should have bought a shooter). Then again, the multitude of options an open world provides is another factor. You can make GTA into a shooter, racer, rpg, mmo, stunts, and hell even a stock exchange (now).
As for the price, if it's 2.5k we all know very few are going to buy it, most will spend their time playing single player pirating it. Still no official wordings, we can all expect this to fall under a 1.6k - 2.5k range give or take.