bit off-topic, but...
I got given a variety of half used and unopened paper recently and the other night I decided to test it to see if any was any good. I also had some Ilfospeed RC of my own I'd been moving from garage to garage for many years!
The Ilfospeed actually is almost useable! Slightly fogged but probably could get away with it on the 'right' image. Any MG III was stuffed, including unopened (a box of 100 5x7's) stuff. I eagerly opened a pkt of Agfa Boriva (spelling?) only find one and a bit sheets left It tested fine, but how to make a print with the remaining sheet... Also some Ilfobrom which seemed fine. Some Agfa RC was gone, some ok (might have been fairly new).