Watergill At-Pac, worth anything????

[Slater]

Ive aquired 2 Watergill AtPac's...
Are they worth anything to anyone or are they boat anchors?
One seems to be complete & the other no longer has a lp inflator assy, im sure the bladders must be wasted due to there age but really havent looked at them that closely at this point.
Just curious if they are of any value or appealing to anyone still..
Thanks for any insight

 

[Slater]

Nobody has any insight on if these are total vintage junk or if they are actually appealing still to anyone?
Im contemplating just tossing them out...