Sadly, my original cube from 1980 broke last year. The plastic just gave way on the center rotating "star" and it came apart. :(
I bought a new one, but it's much harder to turn. I think I may have put some Vaseline in the original to lubricate it, but it's been too many years to remember.
I wonder if Dr. Rubik is getting his royalties now that the Soviet Union is gone (The story I heard was that the Soviets kept all the royalties, giving him a relatively generous salary in return).