Free: Contests & Raffles.
If you find one you like see if a local shop can give you a bulk discount. You may have to wait for an order from their supplier but it's usually worth it.
I own 4 different models and all work great...I just pulled 2 cams lat week that had been out since Nov and still had 3/4 battery life and triggering just fine. My fav is the lightsout model. The wide angle pic should be the only option on all cams it captures alot of area.