From Habr:

If I had invented a time machine, I would have done something more interesting than buying an old one in 1976 in order to sell it back in 2012 to some fanatics.
Sterhel> Sports almanachs for example.
Pel> We know how these stories end. It will start with an almanac and wins on a totalizator, and end with a destroyed city, vacchanalias and some foolish old man on a flying car =)