We have two early-2008 Intel iMacs, and love everything about them but the native mouse, which is as delicate as a soap bubble. Eventually, they stop scrolling. Clean them with alcohol and cue tips, or let them sit for a spell, and they may work again, briefly. The sorriest job Apple has done must be with these devices. We don't really want to spend a lot on replacement strategies; most of our time is iPhone time; after that, iPad. But is there a workable solution under $65?