It really is seldom that I advertise a product or a service, but in this special case the offer is ridiculously good. GOG offers 5 games from a selection for just 10$. And there are really great gems in the list.

http://www.gog.com/news/special_promo_pick_5_pay_10

I picked
- Botanicula
- Trine
- The Ball
- Unmechanical
- Machinarium

Always learn from history, to be sure you make the same mistakes again...