Messer/idiot springs to mind..
You put him up for sale,,then pull him down,,then spend money on behviour lessons (yeah ok) then you sell him for £50 !!! your a prat and a messer mate,,you aint done shite all with that dog,,,its people like you who shouldnt be allowed to keep dogs,,,,another lurcher getting passed from pillar to post throu no fault of its own,,,idiot.