my dad bought this for me last summer and i never really used it but it has a spot on the back. theres no dust bag but i have all the authentication stuff. so the question is how much should the minimum bid be judging from the pictures below. i have no idea about prada or even how much it was so help please ! and which spot picture should i use: 1. with flash 2. without flast thank you so much in advance. i feel so hopeless when it comes to this.