Just saw this discussion, my thoughts are I prefer the non commercial approach OTD. I would hate to either feel that guys were asking questions to promote something they had or feel that I could not get impartial advice because everyone was looking for a potential steal.

My preference would be for the would like to buy section so we could all keep our eyes open for each other. This has worked pretty well on an informal basis amongst a few I am in regular contact and I have both sold and received from people I trust.

Shaun