How much did it cost to create GTA IV? About $50 million? The cost to produce the top-notch games are in the millions, but I don't think I've seen a single game cost that much. Perhaps, based on the payouts thrown around for the HD movie market, that payout could/should have resulted in GTA IV being exclusive to the 360, it would be a bit more understandable. But for some DLC? Especially if the DLC isn't available for another 6 months? Based on that time frame, Take Two probably only began work on it this year.
Nice to have, but I personally wouldn't pay more than $10 for any DLC. I've purchased Warhawk, GHIII, Motorstorm and some complete games for less than $10. I still have a problem paying anything for something I see as material that should have been in the original shipped game.