I just finished building my bike and about 70% of the parts were from Ebay. Some used, mostly brand new. I can't justify doubling my cost to buy parts to support lbs that are jsut out to make a buck anyway. It's a business to make money first, and provide a service second. I've never been in a shop where it wasn't the first priority to make as much money as possible rather than provide good parts, advice and service. Not saying there aren't good shops out there trying to help out, but it is a business first. I probably saved $400-500 by buying as much as I could from Ebay, and that's without anyone trying to get me to upgrade or buy more parts etc. Besides, If I bought all my parts at the shop, my whole bike would have to be a few levels down in components. I can get a deore derailleur for about $70 or more new at the lbs. I bought a brand new xt off Ebay for $60. Ebay rocks. Buy forth.