look at the financials. you can see how previous PIPEs and shares issued for services were priced relative to the pps at the time of the transaction.
if there has been a PIPE, i doubt you'll have anyone broadcasting it. the company isn't allowed to talk about it as it would violate the rule about not soliciting its availability. not sure about the disclosure guidelines for the buyer.
speculation, but I think the PIPE filing was simply to have a facility to raise cash quickly IF necessary. There is enough cash as of the latest financials to cover operations excluding "costs of FDA applications, NanoLogix-funded studies, other tests of our products by third parties, and new patent applications." (from the company update). Anyway, none of the shares acquired thru a PIPE can be sold for at least a year.