To be honest the d40x isn't a load better than the d40. Don't be put off by the 6 megapixels, the sensor more than compensates for it and unless you plan on blowing the pictures up huge (A3 size) then the d40 is a lot better value for money and the 10.2 megapixels that the d40x has really doesn't make a huge difference. The d40x is nikons 'beginner dslr', if your just starting out it'd probably be great for you.
The ebay page doesnt look very legit though, and like the guy above says the stuff that it comes with looks cheap and not very well made. However, the camera should be fine