If I were to purchase these points directly from Starwood right now, it would cost me $393.75 with the current 25% off sale. If you redeemed them for a room, they would be roughly the same value.
Let me recap: If you signed up this card online in September 2012, you were either eligible for a total bonus of 30,000 Starpoints (if you signed up before September 4) or a total bonus of 25,0000 Starpoints (if you signed up after September 4). There were no promo codes. Here's what you would have seen when you went to the American Express website: