[DISC] Monthly ASUKA magazines from 2002/2003/2004: how much are they worth?

I hope this is the right place for this.

I have some old monthly ASUKA magazines (Kadokawa Shoten) from 2002(feb-dec), 2003(jan-dec), and 2004(jan) that are taking up space in boxes and I'd like to give them a better home, but I have no idea how much they are worth. I have tried looking on eBay and haven't found anything resembling this, and Google hasn't been much help either.

These issues contain series like DN Angel and the last chapters of Clamp's X. I also have some goodies that came with them that I wouldn't mind parting with, including some large DN Angel posters.

I'm wondering if eBay might be the best with letting the bidding decide the price, but I'm curious anyway because then I would have the option of selling in other places. Any help? Thanks.