I have just upgraded to an iphone 5 and want to move (sell) my iphone 4 and looking for recommendations on best way to move it with the least amount of hassle. It's black 32 GB with no scratches. It's been in an Otterbox Defender case since purchased. It is now off contract (ATT) and I have erased all content on the phone. Obviously, the options are Ebay, Craigs List or a service like Gazelle or one of the other buying services. It has not been jailbroken and not unlocked at this point. Should I try to get it unlocked or let the buyer do that?
I'm thinking of $250 (OBO) plus shipping and I would throw in the Otterbox case. It would be shipped in the original box with the charging cord and wall outlet attachment. No scratches on face or back and basically looks in new condition. Suppose the ear buds can be included but not sure anyone wants them after being in my ears.

(and only my ears)
Any recommendations, guidance or interest here??