1936 Proof Walker- why is the price triple that of the '36 quarter?

The "Guide Book" lists the half dollar's price in Proof-65 as about triple that of the quarter in the same grade, even though the quarter had a slightly smaller mintage. Why the difference? Is it because the half dollar design is more popular, or because the half's larger size may have made it more susceptible to damage, or some other reason? Does anyone here have a Proof 1936 half or quarter?

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First, the half dollar is the largest coin in the set
Second the design is far more popular than the Washington quarter has ever been. Until the state quarter series came along, Washington quarters had a very limited following. Many collectors just don't find them to be that attractive.
My dislike of the design intensified when I learned how Mrs. Laura Frazer was cheated out of her chance to provide a design for the quarter. It is one of serveral reasons why collectors who know some history have very little respect for Herbert Hoover's treasury secretary, Andrew Mellon. Mellon vetoed Mrs. Frazer's design, and he also opposed the coinage of commemorative coins.
demand
demand
demand
sincerely michael
However, having once put together a complete set of PF66 1936-42 proofs (cents thru halves) I can tell you that nice 1936 quarters are much scarcer.
Also, there are only a few years where Walker proofs were made, and that pushes up the whole group I think.
New collectors, please educate yourself before spending money on coins; there are people who believe that using numismatic knowledge to rip the naïve is what this hobby is all about.
New collectors, please educate yourself before spending money on coins; there are people who believe that using numismatic knowledge to rip the naïve is what this hobby is all about.