MGR registration plate up for sale on eBay N31 MGR Posted: 200303 An MGR registration plate is up for sale on eBay The offer is open until Friday . The advertiser says "the MGR number plates come with a retention certificate. The condition of the plates is new. They will be sent to the buyer by Royal Mail First Class" The price is £280 plus carriage. The items are at Abingdon. See the offer on eBay