£10m!!!! Is he having a laugh? Are you having a laugh? Even if it is a '5', which is debatable, it could potentially be compared with the 1863 pennies with numbers below the dates, like the one with the '5' below the date, which sold for £18,000 and was properly verified etc. No British coin has ever been sold for that much and whoever looks at that listing will just laugh at you Steve and click on the back button straight away! In fact, if it is the real thing (which, again, is debatable) you may well of ruined your chances of ever selling it because people will think.....oh here comes the £10m joker, hide, quickly! Do the homework properly Steve, before you make a fool of yourself like that. Send it to Dr Kevin Clancy at the Royal Mint and see what he says. Or send it to this man http://www.coinauthentication.co.uk/ and tell him I sent you.