Just to be serious for a mo.
Your collection is probably worth very little. Maybe the Southern Rag stuff might be.
But, I would agree with other posters. Donate them to a library, school, music society, dentist(!).
There's some good info in them there mags.
No point in keeping them under the bed is there?
Mind you, you could always try the Antiques Roadshow!

Look forward to seeing you on the Tele!
Regards Ralphie