If no one wants the magazines, you could submit them to Goodwill or Salvation Army. That way they wouldn't go directly in the trash and some or all of them may be purchased by some builder short on funds. You may be able to get a tax deduction if you choose to itemize and claim value of the magazines. In Arizona there are "used book stores" that give store credit in exchange for magazines, this may be an option where you live.
It's kinda sad really, if only people knew that this museum was run by modelers, for modelers in an effort to celebrate and admire builders from the past that did remarkable things without the aftermarket we have now. The innovators of the past have pushed the hobby to where it's at today. I really enjoyed seeing (in person) award winning models that I have only seen in magazines from many years in the past, and hearing stories told by people that were featured in those old magazines.