Mac - GarageBuy
GarageBuy - can be dowloaded and be used at no
cost. You can download GarageBuy for free. All that's required
is an eBay account and a Mac running Mac OS X 10.4 Tiger.
GarageBuy is Universal! You can run GarageBuy natively on your
new Intel- and PowerPC-Mac.
GarageBuy allows you to place bids and purchase items directly
from within GarageBuy. When you are bidding on an auction that
has reached its final phase, GarageBuy will update the current
bid, including the highest bidder's name, every few seconds
automatically. That means you don't need to hit your browser's
reload button until your thumbs bleed.