The 1953 Proof Washington Quarter has one of the lower mintages from the 1950's to 1960's proof silver quarters. It is somewhat easy to buy and fairly inexpensive up to about PR67 condition. In PR68 it is much more difficult. With cameo surfaces it is scarce in most grades. In deep cameo condition it is very tough to locate and expect to pay a big premium if it has deep cameo surfaces in any condition.