I've said it before here, but yeah - Amiga mags are probably the best companion to the systems besides software and hardware. I bet many people don't see the value of 'em thanks to (I assume) being able to download most, if not all of the issues, it's great to be able to have something physical to flip through and no, a laptop or iPad is no substitute! I read through an issue of some random Amiga mag almost daily. Really helps to keep the spirit alive even if I haven't turned on a machine in weeks and hell, I never even tire of looking at the ads too! lol
They're simply an invaluable piece of the Amiga puzzle IMO, especially to anyone that considers themselves a collector. Classic computing mags in general are awesome to have alongside your favorite computers. C64, TI, Atari's, etc.
Good luck with your sale!