Where is the best place to get online parts?  Ive been using Alpha-SPorts for a few years but their shipping is generally $25 even on small orders...any other ideas?

Thanks,
Kevin in NH 

I don't think there is an single "best place". Depends on the part.

For instance, an O2 sensor for my Z8 (delphi re94 25325359) is $183 at Alpha, and I can get them for less than $20 at many places on the net.

It pays to do your homework and shop around.