I don't know about darcy42, but in the case of my school... it buys past papers from TSSM and in relation to other EXAM papers like Insight, CSE, VCAA... I think my school buys that as well/or re-uses old ones from previous years. About 4 or 5 weeks before the Unit 3 exam... my teacher gave me 15+ exams from various companies - ranging back 3-4 years ago. my school gave me a bucket load of exams before the mid-year exam... I finished about 90% of them.
and yes... they are HARD COPY.
We were told getting hard-copies of the papers/exams is the best method of revision, since you can see the lay-out and feel what's it's like when it comes to the real thing, that is... an exam booklet and answer booklet.