I can't really say what the value of those concert toms would be. It is nominal. However, having said that, just watch for the day to come when concert toms become fashionable again! :2Cents:
FYI The seam lifting on that era of drums isn't unusual due to the fact that Ludwig had to switch their glue to a more environmentally-friendly variety at that time and the result was that the glue shrunk and pulled the wrap with it and caused the seams to lift. They can be re-glued, but it would probably be a waste of time -at this point in time.
Again, though, everything is complete and nice and could be cleaned up and restored to very nice examples of what kind of trend there was in drumming at that time. Trust me, everything that's ugly today, will be beautiful again someday! :)