A Premier League club have reportedly made an offer to sign a former Arsenal star who Mikel Arteta sold for just £9m. The Gunners have a long and frankly embarrassing list of players sold for well below market value, with Serge Gnabry’s reported £7m move to Werder Bremen arguably the worst offender given how good the Bayern Munich winger now is. With Arsenal experiencing similar stories with the likes of Donyell Malen and Wojciech Szczesny, it’s easy to see why most fans haven’t been pleased with some of the transfer business the club have done over the years. And one player sold by Arteta cou…