The entry barrier for comparison-shopping service is much lowers nowadays. Retailers are aware of the advantage of being listed by a shopbot so most of them don't block probes by new shopbots. They even pay to participate those popular shopbots.

I came across a newly launched shopbot called onewayshopping today. It is a simple collection of popular price quotes by popular online retailers like drugstore.com, bestbuy.com, etc. It was launched in 2009. The shopping category includes: apparel, auto&vehicles, Babies&kids, cameras, computers, electronics, entertainment, flowers and gifts, health and beuaty, home and garden, industrial supply, jewelry and watches, musical instruments, office, pets, sprots, toys & hobbies, and video games. All have a relatively high profit margin.
