I think the bump posting rule should be revised.
Why should simple updates/questions be classed as bumps? The member is simply letting his buyer know the current status of the transaction, which is good customer service. Example - posting on the thread letting the buyer know their item is in the post, amongst many other comments.
I've noticed this in a few for sale threads, then the thread gets closed, making the seller unable to communicate with potential buyers - this causes problems imo.
Seems mods just want any little thing to use that infraction button of theirs.
Sort it out Admin/Mods, great site otherwise.