Mine was 16 so do not expect as much. You must jailbreak, unlock and when you build your description, reveal everything, if it is worn, then say so, be honest! Mine had been in a high quality case for two years, I had screen protectors on the whole time so I listed as used with micro scratches. I also gave away a case, all of the items that came with the original iphone, someof which were new and I stated which ones were new and which were used.
I took high quality pictures and showed everything that it came with. During bidding, I did not accept any bids from low level buyers. I would only accept bidders with a lvl 50 or higher. Run your sale for 48 hours or less. Give shoppers a chance to shop and mark for bidding.
The biggest thing I can recommend is that you MUST be honest and full disclosure. Jailbreak and Unlock...the tools are out there and it is easy.
Track the bidding and cancel out any of the low level scammers, you can tell who they are. Even then, you could utlimately get hosed, ebay is not what it used to be and I was on pins and needles for 2 weeks after he recieved the phone.
Hope that helps...Good Luck and most of all BE CAREFUL!
PS...Dont know if this will help but here is the listing:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=160454692876&ssPageName=STRK:MEAFB:IT