Imho, placing an order (ANY order) is truly an exception rather than the norm. A lot of people have still been turned down when they asked if they can place an order - usual answer, "NO, the list is closed, not possible..." This is the case, even at FSH (despite reading some success stories here on TPF, failure cases are more often than not the case), hence, if only after a birkin, I guess best to try one's luck during daily delivery times, i.e. 1030 when the store opens, and after 1400. Again, it will be down to flexibility of personal preferences and luck. By all means, try and ask if an order can be placed, but perhaps expectations can be adjusted with the knowledge that chances of getting it through might be slim.