Staples has the newest version of Logitech Wireless Trackball M570 for $39.
99.
Link: http://www.staples.com/Logitech-Wireless-Trackball-M570/product
Free shipping if you add something for $0.01 or choose Ship to Store to
avoid shipping charges or buy things that you don't need.
I searched previous posts and they had the same thing for $39.99 on Amazon (
no tax) but the state I live in wants tax on all online purchases anyway (
the infamous "Use Tax") so it doesn't matter to me, have to pay it either
way. For those of you in similar situation, this might still be a decent
deal.