Get them out of there,

maybe this is a good cause for forumites to lend a hand and help others out.

ASAP flush the bikes with fresh water, I mean get the seatpost out and stick a hose down there.

the bearings need to be opened, cleaned and regreased, and I mean anything below the waterline.

hopefully a fellow forumite close to you can get them into their nest and start tearing them down.
the 3 speed hub needs stripping and rebuilding.
loose ball bearings are dirt cheap so it wont cost much to do this.

got home insurance? will it cover the costs of full service?
hope they dont pull the "it was only worth 50 dollars" routine,
hope you dont have statefarm!!