Id say get 31 mining in f2p, then bond the account and get mining outfit from Motherload mining (gives small xp boost) then go back to powermining. That way if u reach ur goal of 85 mining, when u go to sell the account it has full mining outfit, if ur lucky a pet. Makes the account seem more complete to me idk if it will drastically increase the price or anything. But if i were spending 35-50mish i wouldn't want to have to get the outfit on my own after spending money on an account.