set (great) store byVALUE, attach great importance to, put a high value on, put a premium on, THINK HIGHLY OF, hold in (high) regard, have a high opinion of, rate
[TahlilGaran] Dictionary of Contemporary English ▲
set store by v. phr.,
informal To like or value; want to keep. Used with a qualifying word between "set" and "store".
George sets great store by that old tennis racket. Pat doesn't set much store by Mike's advice. [TahlilGaran] English Idioms Dictionary ▲