The OP may be out of town and unable to access the site or only does so irregularly.
If you posted a question, or better still, an "I'll take it" to the thread and the OP does not reply within 2-3 days, does not have PMs enabled, or did not list his email address in preference to using PM, you can do nothing more. Forget it and move on. It is his loss.
There are also used gear forums at NWHikers.net and Whiteblaze.net