Well, what "grade" of shotgun are you looking for? For your average pumps and autos, the big sports stores such as Big 5, Gart Sports, Sportco, GI Joes, will have what you're looking for.

For more spendy guns (and better selection), Wades Gun Shop in Bellevue is good or Kesselrings in Burlington.
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"If fishing is like religion, then flyfishing is high church." -Tom Brokaw