Let's see...
3. Candy cigarettes - They still sell these down at the local 7 Eleven
14. 45 RPM records - I still play these
16. Hi-fi's - There's an old Pioneer stack system still playing in my parent's house
19. Blue flashbulbs - very vaguely, but I remember what they smell like, so I guess they count.
So 4. Yay for youth.
