I fully agree with many of the members here.
The sale transaction is between the seller and buyer.SRC should not be involve unless call upon by both party.
A person saw a sale ,get interested ,can always call or PM the seller for the selling price and detail.If he decide is ok then he can make arrangement when and where
the transaction should take place.
At the point of transaction the buyer should check and inspect the item before doing the transaction.
If everything is up to his expectation,then the transaction should proceed otherwise
it can be cancel due to whatever the reason or fault detect.
There should be no heart feeling by any party should a transaction fail.
Buyer or seller both don't lose anything.
Verbal or written attack on a person after a failed or sour sale should not be encouraged in a forum.