What beliefs would we consider reasonable for a self proclaimed Christian to hold?

[He lives]

There are 8 witnesses to an accident. Each one has a different story to tell. Each one has a different perspective of the accident. Does that mean the accident didn't happen? Of course not. The same is true for NDEs. Thousands of people throughout the world have had NDEs and they did happen. Much like the accident people who have NDEs have different perspectives of what happened. However there is enough correlating evidence to prove that NDEs do happen. There is also evidence that the spirit leaves the body when a person dies.

Sure, sure.  (patting loony on the head)
Thousands of people have had NDE's, because when death approaches, the brain function is gradually impaired by the loss of oxygen levels, etc.
Millions of people have tried to prove that a soul exists because we're so egotistical that we can't imagine a universe continuing without our consciousness in it.  And hundreds of studies have been run trying to prove that SOMETHING exists the body at death.  No results yet.

Let us know when the scientists come up with something credible. (Oh, and stories from NDE believer sites don't qualify.)
You enjoy your fantasies about NDE's and your little conversations with your imaginary friend.  You obviously desperately need the comfort of delusions.  I'll keep believing that neither exists until there is solid scientific proof.

Bold added.

Please let me know when there is credible proof that NDEs are caused by oxygen levels. Please let me know when there is proof that life came about by happenstance. Logic should tell you that our bodies must have been designed. Miracles happen every day.