Starting bid cannot be changed. Thank you for understanding.
6.2.3. An auction cannot be modified once a bid is placed with the exceptions of its Buy-It-Now ("BIN") price, bid increments, adding payment methods, and/or adding additional domains at no extra cost. Once a bid is placed, every allowable change (the exceptions just mentioned) must be posted to the thread as a new reply as well as updated in the original post before it becomes effective and valid (e.g., a BIN price cannot be accepted until this is done). BIN prices are not reserve prices and therefore do not affect rule 6.2.10.