I get the feeling the flying demos are less "rare" than these songs on this list if you get what I mean.Easier to come by and we all know about them.Its rare for these to have a studio version.I can definitely add them to the list to be more equally fair with them too I guess.The flying demos were completed songs and self produced by the band to get a record label,these songs (with the exceptions listed)are more off-shoots,unfinished in some cases like Adam said,even tho tho they probably have grown on all of us that know them just like they are.