IIS classifieds are a great forum. As with any purchase elsewhere, I always do a little research first - normal due diligence.
Most purchases are 110%, but a couple of exceptions re packaging/poor maintenance have occurred - that comes as caveat emptor - and I simply won't consider trade with that seller again. Never any argument or disagreement - just walk away, we are all different in our individual ways.
As a result of the positive interactions, I have "met" many IIS'ers and continue to have great PM discussions and received a wealth of assistance from them - thankyou!
Important note though, IIS classifieds and its success in our community are a reflection on the organisers and moderators who have provided us with an irreplaceable means of contact with like minded people, my hat goes off to you!