Used USA or European produced tools are your best bet. Forged is the only way to go. I have helped out several GJ members with their first Body tools. One of my odd hobbies is reworking / restoring neglected and abused Forged Body Tools. I always have many extra tools on hand and I can set you up at a very reasonable cost.
I've heard it said that if you don't know what a good Body Hammer is, then you won't know the difference. I totally disagree with that statement. If a guy just wants to beat and fill, then he won't know and doesn't care to know. But If that person really wants to minimize the damage they can/will do with poorly designed tools and keep his material usage on the low end, then yes, well designed tools will make a HUGE difference.
There are a few simple tools you need to get started. A good balanced medium pick hammer, a cross pein hammer, a toe dolly, a good rail dolly, and a small spoon. These tools will take you a long way.
If you would like, shoot me a PM and I will go into more depth. This is what I do and enjoy helping others who are eager to learn panel repair