I don't know whether it was another episode of mania, I bought a new IBM optical mouse (31P7410) from Yahoo! Bid. Because the postage is a little bit high, I persuaded another 4 people to buy one.
Oh… the leather-like texture on the cover makes me feel very very satisfied. But now, I have desire to buy a new IBM keyboard with Trackpoint (Space Saver II), again. @_@