www.lickbike.com <--"beats any price", "finds anything", they've been good to me.
www.cbike.com
www.performancebike.com
www.nashbar.com
www.tri-zone.com
www.ebay.com <--patience, grasshoppa
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www.qbike.com
www.bestbikebuys.com <--gives a good price estimate, but doesn't search as well as google
bad business:
www.tri-sports.com