RE: Have a TX/RX, now I need a camera.
I really like the two "spy cameras" I bought on eBay. They're wireless, CCD, color, no sound, run on a 9-volt battery, and the receiver plugs into an RCA jack.
Oh -- did I mention they are under $30? (Price includes shipping!)
Just go to eBay and do a search for "B09 203C wireless Spy Color Camera"
Best of luck,
Freelancer