It seems to be some sort of Leg-O-Mutton or similar 3-sided sail hardware. In any case, the brass sailtrack and slides are quite hard to find these days and pretty valuable. It might be a good starting point for someone building or restoring a traditional decked sailing canoe similar to the one that Andre picked up recently or something like a sailing peapod.
If the price stays low, somebody local should grab it and if nothing else put it in storage. It would cost a bloody fortune to duplicate those spars and their hardware and sooner or later somebody is bound to show up willing to pay a pretty penny to get them.