I presume the buying is waiting for confirmation of any deal. The last PR was more of the usual "this is what we think will happen" stuff. More detailed and more promising, but still nothing finalized.

"A group of Canadian investors have decided to participate in the further development of the Diamond Creek Mill facility, owned by Silver Falcon Mining, Inc., and the Sinker tunnel drilling program, subject to verification of the facts."

Look for buying once a finalized deal and financing are announced. Until then, investors will be wary as they have been trained to be over the years by statements of imminent events in PRs that never happened.