both of these are great stores. Sven's is pricey but they have stuff your average place (e.g. West Marine) does not. Blue Pelican's inventory is constantly changing, since it is a consignment store. I know a lot of people who've found great stuff there.
Happy shopping/ killing time!
2003 Silverton 38c (not a trawler)
Marina Village, Alameda
San Francisco Bay Area