I'm no expert, but looks real to me. Looks exactly like this used one (http://cgi.ebay.com.hk/ws/eBayISAPI.dll?ViewItem&item=220236754866) for sale in Hong Kong ebay for US$800+!! For $300 this looks like a great deal plus it's unused.
Well the HK grommet hobo proves that the bag previously asked about should have an authenticity tag as well as a font to photograph. why won't the seller cooperate? A potential buyer isn't out of line asking for more detailed pics. This bag has been faked so you need to be careful.