I would build one rather than buy one. The sony p32 camera's yield me around 400 pictures off 2 AA batteries. out of the 400 around 330 are with flash. If I only had more day pict's the number you could get would drastically increase I think. the sensor runs off of one nine volt battery and will last around 4 months maybe more. just check out some of my pictures I post on here doing a search or I think some may still be on the first page. I visit hagshouse.com and jesse's hunting page. both are great sites to visit and a bunch of willing people to help you out. If you want there are even people that will build them for ya. I am not a commercial guy but just the do it yourselfer.

here is a link of some of my picts

http://forum.hunting.net/asppg/tm.asp?m=698921