CREATE TABLE table_451 ("Character ( s ) " CLOB, "First Appearance" CLOB, "Cover Date" CLOB, "Publisher" CLOB, "Estimated Value" CLOB)

what's the estimated value where cover date is august 1962
SELECT "Estimated Value" FROM table_451 WHERE "Cover Date" = 'August 1962'
SELECT "Estimated Value" FROM "table_451" WHERE "Cover Date" = 'August 1962'