World of Goo is being sold for the right price, and by "right" I mean "as much you think you should pay for it".

This, of course, skyrocketed sales, but most purchases were for 1¢.

I got curious, bought the game, and found it surpringly enjoyable... enjoyable enough to make a strip about it. The production quality is pretty high and the puzzles are surpringly not repetitive, something I dislike on the genre.

Closing comment - Give it a try, you probably will find it more worthy than you payed for it.