On the other hand you can't get a wired trackball from them that has the ball to the left; the M570 and the MX Ergo are wireless-only. I have an earlier wired USB Trackman Marble with a PS/2 adapter, which I'm glad I bought and squirreled away when it was available. My 20-or-so-year-old PS/2 Trackman finally started to show its age, and the "newer" one came out of storage to replace it.

I see that the wired USB/PS2 Logitech TrackMan Wheel is available from refurbished on newegg for USD 45. I'm tempted to give it a shot now.

Hmmm... might be worth looking into. (The trackball I was referring to was that, not the Marble). It wouldn't be bad to have a spare, though if this one holds up as well as the ancient Trackman I retired, I won't be needing it for a while.

> I have been using this forever and swear by it.

I think it's been at least 10 years for me.

One nice side effect of the design is that you can switch hands if/when your wrist gets tired (I write with my left hand and throw with my right hand, so ambidextrous trackballs work very well for me).

I've had other trackballs along the way, but this one suits me best, all the more so given that it's small and lightweight (on the road most of the year).

I could swear this was no longer available last time I looked - thanks!

I think there's some confusion. The Trackman Marble is OK, but it's the Trackman Marble FX that is the best trackball, and no longer in production: http://weblog.mrbill.net/archives/2007/10/17/why-cancel-good...

How do you scroll with the Trackman?

My trackball has a wheel around the hall for scrolling. It saves a lot of effort. You can always click on a scroll bar and hold it. Any up or down movement scrolls the late.