Tips on Buying Cars: Concern about a fair price, suzuki sx4, true market value

Question
I signed a paper with the break down of the costs and purchase price of a new car. I left a credit card number as a down payment.  No credit slip was signed and no copy of the paper was given to me.  I did not take delivery of the car.  I have since learned that I was charged $600 over edmunds.com "true market value pricing" amount.  Can I still negotiate the price or walk away?  Also, how do I find out if the fees such as "tire fee", "waste recovery fee" and transfer title are correct or legitimate?  And on what amount are they supposed to charge tax on: the full MSRP plus fees?

Also, the price of the car before fees and after rebate was 15887 for a Suzuki SX4 Sport Touring manual.  Is it a fair price?

Thanks for your help.

Answer
Hi Heidi

From what you posted you bought a car, there are many questions that I would like answered to see if there is a way out or getting a fair deal, to post and asking counter questions I could be on here all day.

I you like I would be more than happy to phone you to give you options, make sure you check the make private box if you post your phone number along with best time to call

Ray

PS, I am sure if you would have had the chance to study some steps how to by a car on my website you would not be in this situation   http://www.usedcartips.org/