Buying a good used car (Panama City)

Hello every one. I'm a newcomer on Panama Expat. I will be moving to Panama City from Switzerland early May. My wife is already in PC, working for a big Swedish company. We are wiling to know and meet people. Also we'd like to buy a car. So if you are willing to sale yours, let me know. Preferably a 4x4 Suv.
If you feel like having more information, feel free to ask.
Looking forward to meeting a lot of you guys out there in PC.
Pascal