GB will not allow any changes to the listing once a bid has been placed. I had one up for bid recently, a couple of bids were placed, then someone had a question. I felt that all involved deserved to have that info, but I couldn't add a note. Benefit of hindsight. I suppose that if those that had already bid had done so without further knowledge, it would be unfair to give others that info. In my case, it was info I assumed everyone would know about that pistol. Apparently some didn't.