Whatever you do, don't waste money on expensive optho/otoscopes for M1-M2. If your school doesn't buy a steth, I'd get one. Reflex hammers and tuning forks are like $5 on Amazon.
In my opinion, spending money on a tablet to read PDFs comfortably and conveniently is the best way to spend money for med school. Add a nice pair of headphones and desk chair and you're set.