You could check Costco, we found an older Panasonic Z-series there for $119. Great camera, small and light, 25-300 equivalent zoom (that's very wide to long tele), and optical image stabilization. No AA batteries, though. And in Costco's case, "older camera" means maybe 9-12 months on the market...
For a trail camera I would require optical image stabilization (I.S., V.R., or O.I.S.), and a good wide angle lens ("30mm equivalent" or wider.) You can certainly get a great camera for $150-200, and with a little searching you should be able to find something closer to $100.