A very small portion have glue/grass residue.  Many have a white paint circle on underside.  Overall condition is superb/amazing.  The small grouping of about 40 came from one estate sale with very early heavy Bachmann N engines.  The rest all came from one estate with Atlas, Trix, Roco vintage clean cars and engines.  There are well over 400 pieces of track in this lot.  I think all cleanish shiny rails in generally ready to use shape.  There is a new switch from Model Power, three new packs of Atlas N curves, empty trix boxes, a cool billboard kit from way back.