@edgarblythe,
Sorry to see that. I know you're very health-conscious so I wanted to try to help where and however I could.
I wonder if locally I can find organic watermelon at Whole Foods here. I suspect I'm limited by what they'd (over)charge, as well.
{Edit: I just checked with Whole Foods (large organic health food chain)locally and it's roughly about $1/per lb when it's avaialble, though not available at the moment.}