Well said luis. Joe I hope you really, really think about what you are getting into with these animals. Just setting their cages up so that they can be healthy costs a lot of money. Then there are the feeder requirements and costs. The feeders need to be gutloaded and dusted with different vitamins and minerals (depending on the age and sex of the chameleon eating them). It's a lot of work. I've already painfully seen another newbie on this forum who (obviously) blindly went out and purchased a chameleon because they felt that their previous experience with reptiles (not chameleons) was enough to warrant acquiring a cham.
Here's what I did. I purchased my first cham 16 years ago from a friend who owned a petshop with his father. She was a veiled chameleon and probably could not have been more than 8 weeks old. He only had mine and my chams best interest in mind (unlike many petshops). He gave me the best advice (for that time period) that he could.
Miraculously, she lived to the ripe old age of 6 1/2. It took me 9 years before I felt I was ready for another. When I started researching, I realized that many, many new things had been discovered regarding their care. It took me another year of reading everything I could (and finding this forum) before I felt I was capable of caring for one.
Please, don't rush into this, the life you save may be a chameleons. Research, research, research. I wish you all the best.