I would be interested in finding out what GPS receivers archaeologists are
using in this post-selective availability era.

I have some experience with Trimble units but these seem terribly expensive
for what they offer and I was wondering whether there are other alternatives
around.

The primary use for a GPS would in my case be in locating sites and
producing accurate AMG grid references and possibly tracking survey
transects.

Iain Stuart
Principal, Archaeology and Heritage Management
HLA-Envirosciences Pty. Ltd.