If PoE is not a must ( as it likely would be easier to source AC power indoor ) then the armcrest pro hd line are made by Dahua, and can often be found at the ~$60 price level. (
Amcrest ProHD 1080p 30FPS WiFi IP Security Camera (White) $62 + Free S/H)
They are made by Dahua, picture quality is quite good, with the built-in IR night view is adequate for indoor usage ( of course if you have a 600 sqft room you might still find it dark at places. )
If you wish to do PoE, you can still get some 802.3af 5v splitter of amazon or ebay at $8~$10 a piece.
Mine had been running with no hiccup for 2 month.. will see if it can hold 2 years : )