Prius C 4 Negotiation

I am in the market for, you guessed it, a Prius C 4. I have been to 3 dealerships so far, mostly to ask questions and test drive, and today I was ready to buy. Or so I thought. I went through my USAA car buying service to get a guaranteed price. They quoted me 22,170 (not including tax and title) for the color I want with the moonroof. I called the dealership yesterday to ask about getting the color I wanted, and specified that I didn't want any additional optional features (like side moldings or 16" wheels) because I wanted them to match my USAA quote. Of course they said they can get the exact car I want, and that price is guaranteed. Yay!

Went in today, test drove and sat down to do paperwork. They brought me the specs of the car, and of course there are $1700 worth of "extras" on it. That's the bigger alloy wheels, some carpets and the body side molding. Then they tell me that the 22,170 includes $1000 cash back only if I pay cash, and since I am financing it I don't qualify. I had called to ask about that exact thing, and of course on the phone they told me they would match the price anyway. Fine. Not the case now that I'm in the dealership.

So bottom line they offered me 23,855 (not including tax and title) and said it was the best they could do. MSRP is 25,870. I walked away and said I would need to think about it, given that I was mislead about two very specific things that I had stipulated before coming in. Do I do this deal? Essentially I would be paying $1700 for extra things I don't care about. Along those lines, how much is color worth? I really want that blue and as we get closer to the end of 2014 I am sure it will be harder to find.

Would appreciate any feedback or opinions. This is my first car buying experience, and I don't want to be taken advantage of but I also want to know if I am being naive in thinking I can do any better than what they're offering. Thanks!