ORIGINAL: BuckRogers
I think the moutrie 2.1 (I think i have it) could be 3.1 even should run right around $100. I love mine. You will need to bait the camera with something but they take great pics in my opinion.
I'm going to jump on the moutrie bandwagon. I really think they are the most bang for your buck. I just got the 4.0 IR model and it takes amazing day and night photos. For an extra 100, get the 6.0 model, it also has an internal viewer.