black and white – What to do with old photo paper

I am doing some spring cleaning and have discovered (well I sort of knew they were there) at the back of a cupboard the following un-exposed B&W white papers:

  • Ilford 5×7 Pearl Multigrade IV RC Deluxe. 100 count, un-opened.
  • Ilford 8×10 Glossy Multigrade IV FB Fiber. 25 count, but opened.
  • Ilford 8×10 Satin Multigrade IV RC Deluxe. 25 count, but opened.

These all date from the late 90’s. Are the usable? Should they simply be binned? Or would they make for some interesting effects for someone so inclined to actually use them?