Arsenal have pulled off quite a few bargain deals over the years. The Gunners’ management of transfers before Mikel Arteta and Edu Gaspar joined forces wasn’t great at all. From giving ageing players long and lucrative contracts to overpaying for mediocre players, Arsenal did it all. However, in recent years, Arsenal have been much better on the market, and Edu deserves a lot of credit for all the good work he has done. Martin Keown has now heaped praise on one bargain signing Edu pulled off not too long ago. Martin Keown says Arsenal should’ve paid more to sign Leandro TrossardLeandro Trossar…