I was looking for a box of 16x20 Ilford Classic which is out of stock at B&H right now. Lo and behold they had a 50 sheet box in their used section for half the price. It was listed at 10/10 condition and the only comment was the word "box." I bought it but am curious to know what I'm actually going to receive.
The problem with bw paper from my point is the expiration date on the box. I can't remember I ever saw it on Ilford RC deluxe. Perhaps I had the need of glases long years before today - but I realy don't remember.
The same may be with other brands. No problem I would say because bw paper is good after years of good storage. But this is also the main issue (after years) how has it been stored.
So try your best if you have luck it is a good deal.
But I would not do this again if I were you.
I remember a roll seen in a store 1,40 x 30 (meters) it was in bad condition from the package. Sure nobody bought it - for a long time it stand in the store.
May be 8years may be 12 years who knows. And nethertheless if others report you about 20 years old papers with ecellent characteristics it is allways depending on the price. Because there is allways a RISC to buy scratch.
with regards
PS: Used paper would mean someone used it in a darkroom and there is a rest of paper in the box.
At a price less 90% - less 95% such offerings may result a great suspence while re-use it.
But (so it seams to be in your case) it could mean : A couple of boxes were used in a darkroom and the sale is in regard of unopened boxes from that batch.
At a half pricing - wy not if you are a risky loving man.