Where sell second hand arts & crafts supplies?

We're clearing out loads of arts & crafts supplies from my mother's old room. She sadly can no longer do any, and we've a huge bunch of calligraphy equipment, papers, stamps, stickers, paper cutters, light boxes etc.

Can anyone recommend somewhere I might be able to sell a load of these? Not looking for much, just want to avoid chucking them or selling them for nothing.