Freemoney and bitcool:

Will do 50 btc with each of you.

On silver spot price trading below 30 at least intraday before may 31, 2011.

Consider it booked. I just want to know what source you consider valid for this. I watch Kitco, don't know if that's lame or rigged or whatever.

Booked.
I am fine with whatever source, as long as it tracks New York SILVER SPOT. kitco is fine, see link:

http://www.kitco.com/charts/livesilver.html#ny

Sure, I am in.