Well, the deal was simply too good to refuse, so I bought a second iMac G4, which was identical to my first one. 17-inch, 1.25GHz, USB 2 model.
(The first iMac G4 which had logic board issue was replace with the help from phreakout. thread)
(The first iMac G4 which had logic board issue was replace with the help from phreakout. thread)