The 1968 Washington Quarter has a very large mintage making it easily obtainable from circulation in circulated grades. In uncirculated grades it is also easily obtainable in MS60 to about MS65 condition. Examples in MS66 are scarcer but can be purchased at a small premium. In MS67 condition it is really tough to find with many examples being graded and sold at a significant premium but probably still hundreds of examples are out there. In MS68 condition it is truly scarce with less than handful of examples known and none being known in finer condition.