Many manufacturers won't honor the warranty if you don't buy from an authorized dealer. Pay attention to this when buying online. If you're in the market for more then 1 camera my advice to you is buy 1 at a time in case it's not what you were expecting.
Decide what functions you want in a camera and what application u'll be using it for, this should narrow down your search.
There are many threads in the trail cam forum that have many different cams with the pics posted. Do some research and decide what you like.
And don't be afraid to ask more questions!