If you've ever heard about a Yahoo acquisition and thought that the price sounded excessive - or heard about a sale and thought the opposite - know that Yahoo's CFO is aware of the problem. Tim Morse recently indicated that the company is trying much harder to spend wisely. Morse told Brian Womack during an interview, "You've seen our track record on M&A with buying really high and selling pretty low. We've got to be careful." So from now on,