The salary cap rules would prevent him being valued at absolute minimum, as handy said earlier, but I think current circumstances would see them approve a decent haircut.
According to the news, his agent has asked the Dragons for a 3 year deal but they only want to offer him 2 plus they are waiting on an answer from Gutherson to join them in which case, they will skip on JAC altogether.
So, Gutho going to the Dragons could leave JAC with few options (maybe the Eels offer him a deal though if they lose Gutho?) and although there's be no word at all to indicate Wayne is at all interested in snaring JAC, it wouldn't surprise me if JAC's people (again) contact Souths and we become a "surprise" suitor for his services moving forward.
So, hoping Gutho decides to leave Parra for Saints to start with. (Wonder what Sloan will make of that?)