Hi there XOEE -
If you have a BIN price in mind, please post it before a bid is placed. You cannot change an auction once the bidding starts. That includes adding a BIN price.
Please also include a "clear end date and time" for this auction (ex: July 25th at 10pm est, or "24 hours after a final bid is placed") either method is fine.
Thank you very much -
Jennifer