I have a bunch of large lawn sized trash bags filled with used children's clothes I wish to donate. I can either give them to my SIL (who works in a school and can give away), or call an agency like Big Brother/Big Sister, and ask them to bring some receipt type slips. Of course, it would be quicker & easier to give to SIL. How much of a deduction do they usually give you for each bag of clothes? The stuff is close to new, and includes some designer stuff. I seem to remember getting a preprinted slip with the deduction amount in the past, but that was a long time ago. Is it worthwhile? Its getting donated either way.