Lightly used ones sell for around $350 to $450 on ebay right now. I would set your reserve AT LEAST at $300. It depends on how badly you want to sell the bag. If you really want to get rid of it, then don't place your reserve too high, otherwise it won't sell. If you can hold out for a few auctions (or more) then you can set it higher... just remember you'll be charged all those ebay fees.
As for you having a newer account... yes, people will be wary of you. Make sure to take EXCELLENT pictures (use the Macro setting on your digital camera). You need to take close up pictures that show the date code and all angles of the bag. Make sure to watermark your pictures too. Also, do you have a Paypal account? People will be more willing to buy if they have the added security that Paypal offers. Hope that helps some.
