It may be done, but if the buyer really is some big company, the PR will be on their terms entirely. I don't think 'toying with us' is the proper phrase, instead they could simply be preparing the way a big business would, getting all their affairs in order before allowing the public to know.
To me, the silence by all involved is entirely understandable and expected. I am amazed by those that think a buyout negotiation would be transparent.