I've noticed recently a lot of people selling mobile phones on eBay and in the listing they will put that the phone is from a job lot auction and they don't know the history of it. Do you know where these auctions take place?
Try Scamatown. They have them every week. If it helps you could subscribe to my weekly newsletter detailing where these auctions are held. It's just £9-99 a month. Shall I sign you up?