I read a story once about a book on Amazon had an outrageous price due to two competing sellers that each had an algorithm to automatically adjust their prices based on the other. I don't recall the exact logic on it but the first would purposely set their price slightly higher than the second. And then the second would rest their price to slightly lower than the first. But the the percentages used caused both stores to keep rising. eventually the book got up to some insane number.
Edit: here it is - http://www.michaeleisen.org/blog/?p=358
Not a referral link? Missed opportunity.
They forget to mention that its 192 feet long and 55 feet in diameter perhaps?
Don't forget to order extra helium.
Buy 2 get one 1/2 off?
shipping is free though!
The licensing for the font on that balloon was rather expensive, and the balloons internal blatter consists of panda skin.