Specific recommends? for china import wireless backup cam?

I HAVE a cheap ebay china "wired" backup cam, but the cable connections have been giving me fits. I'm thinking of getting a wireless setup, and with some "connectors" (like a trailer pigtail) I could easily transport it between the White Whale III (01 2500) and the mini White Whale (Dakota)

So budget, but halfway decent, and your experience?