Interesting observation David. I would want the availability to reply as well, but for different reasons.
1) The ease of dropping prices or adding items - re- posting is not fun.
2) The ability to update your for sale items as sold, or add additional pictures as requested by the buyer(s)
3) I have seen quite a few posted items in ERROR. It would be nice to be be able to reply to the seller and politely correct his listing. Or help them by adding a product picture.
4) Some sellers never reply via email - Would be nice to have closure. What happened?
5) Some people are difficult to deal with or seem to sell items to the highest bidder over and above their original list or reduced price.
It would be interesting to note has the forum traffic been reduced since the new rule?
Either way, I still would like to thank the OGR staff and moderators for their time for this service.