I guess it all kinda depends on how serious you take it and also how much money that you wanna spend. This year I just had a ordinary camera to start out with and i got around 800 pictures of deer. Probably not a lot to most folks but thats pretty good for around here. I have seen cameras any where from 50-250 bucks and I had a 100 dollar and this year I upgraded to the Cuddeback IR and I haven't put it out yet but I will soon. But, I really don't see a lot of difference in any of the cameras. I mean they all seem like they can get the job done.
Good luck!