Free. Probably 50 or 60 or more batten charts spanning the last 45 years from several hang gliding manufacturers. Dozens of make models and sizes in all. Also available are dozens of HG and PG manuals and an extensive pile of magazines from same 45 year span. Pick up @ 4231 Sepulveda San Berdo late afternoon Sunday May 23. Contact: email@example.com and reply to this thread to claim. Fair warning, trash pickup in my area is monday morning.