2 options. stay at vale playing league one football. come to tarn , play league one football from august.
What you mean is 2 options. stay at Vale playing league one football, until his contract runs out in the Summer and then move to a Championship side for start of next season, getting a better deal for himself because there's no transfer fee. Come to Oakwell , play Championship football til end of season, be contracted for at least another season that sees him play league one football from August. If he has any sense he'll go for the first option.