Faster, frictionless, cheaper, better: these are said to be the hallmarks of economic activity on the Internet. Search theory suggests use of the Internet could reduce the prices consumers pay, but product branding, price discrimination based on data mining, and auctions may raise prices. The Internet has lowered most prices, but raised others, even when shop bots are used. Price dispersion is greater on the Internet, and Internet sellers change their prices more often. The role of intermediaries has not been reduced. The quality of service is idiosyncratic and highly variable. The Internet is a new and distinctive avenue of commerce, but those who argue it has invalidated conventional economic principles are well off base.