Since a while I observed the following ebay tool is available: you can follow the activities of a buyer:

Advaced Search-->Items by Buyer-->fill in Buyer name--> click enter

you can see what he has bought, on what he placed abid (even if not the highest bidder!).

This can save hours: because some of us..always bid in the early minutes of an auction to get remembered that the auction exists...here you can hook on.

I believe its possible to prevent this: if you set your account on "private" status: but not sure about this (can someone of the US players test this?)

Alex

PS: does not work for German and other Euroean bidders due to law regulations...but works fine with the US players....