Yes, they should have told you, but you should have asked for a Carfax History Report to insure that it has not had any previous problems. Since it has only been 7 months since you had bought the car, you can go back to them and see what they tell you. To be honest, if you do not have actual evidence saying that he did not tell you that the car has been in a wreck, you do not have much of a chance of winning a court case against them. Also, you really over payed for the car. A car should be losing at least a quarter of its new car value when it has almost 50000 miles on it when you bought it.

Ok, here we go... for starters, I understand you wanting a different vehicle based on the fact that a rear seat in a Tiburon sucks when there is a car seat in it.. you have to be quite a contortionist and have major upper body strenght to put a kid in and pull them out of a rear ward facing car seat(if one will even fit in the back seat, otherwise, sounds like you will be having lots of fun getting in and out of the back. Next, as far as the dealership, they should disclose to you any major damage, as long as it exceeds by a certain percentage the total value of the car. So, for example, if a car is worth 15k, and the benchmark is 50%, they would have to disclose any accident exceeding $7500 in repairs. This is assuming they knew of the accident, which some do, and some dont.I am guessing that Carmax has pulled a carfax, because they are quoting a specific month and year for the damage, which is how a carfax usually reports. See if you can post on here to see if someone will pull a carfax for you on their account. Some people here have unlimited accounts, and as a nice gesture, in a case like yours will pull it for you.My advice is to go to some different dealers, and see what kind of deal you can make. Most dealers do not pull a carfax, and unlike them, you are not required to disclose damage you know about to them. It is not the most moral and ethical thing to do, but it is a solution to YOUR problem. However, you seem to owe an awful lot of money on this tiburon. Did you get any additional items (warranty, credit life, etc? If so, you can cancel for a refund of any unused portions). You might have a situation where you are in a negative equity situation. You will find out soon enough.Good luck with everything.