There are plenty of payware snipe programs and free programs. bidwatcher is
free but last time I tried it is was not working (may be better now...)
Jbidwatcher, a Java program is also free.
I use Auction Sentry, one of the many Windows programs (the license is $15).
I run it in a Win2K session under VmWare because I use a Linux desktop.
There are other emu's you could use including free emulators. I decided at
some point that I was tired of Bidwatcher breaking... since there was no way
to directly pay for support, and Ebay UI is just too volatile, it's hard to
see how a free software project can keep up with this particular kind of
problem (screen scraping a changing user interface).
So I pay...
-- John.