Car shopping

So after my car died the other day the mechanic came by... he thinks the fuel pump went out again. This Is the third one to go in. Someone said something to me today that made me wonder... could it be the ethonal gas I occasionally use? Well anyways... our mechanic advised us to get rid of it. We started car shopping. It's for me so its whatever I want... sounds like we could get at least 2000$ for the Buick. They gave a kid 2000$ and his car has way more miles and the tranny is out. Carmax will allow me to transfer from any location with fee of course but they have some that I like. I'm still looking and I have a month-month and a half to decide...I'm scared... we havnt ever had to deal with a car payment. Kirt had his paid off before we met. I am still hoping for an smaller but roomy suv and I would like to stay under 15000$. I am gonna try and hide close to 10000 to be comfortable. I like Nissan. I am wanting a murano. I hear good things about it but the person I know that has one she said hated it because of blind spots. I am torn... I know ill figure it out soon. The car has to get us through the next five years and I really don't want to have a ton of maintenance for it... I'm tired of shelling out money for a car that is just gonna have problems. There is a 2002 (or maybe 2004?)  car I was looking at that was within our price range (13000$) and only had like 52000 miles? it is one that we can have transfered so the consideration is there. there are a few I'm looking into and I've got other car lots I wanna look at. I know by Christmas I will Defently have a different car. I won't drive the Buick to mo for Christmas this yr. I'd be afraid it would die again while were there. I'm done shelling out money for that car.