FareBuzz does the classic unethical maneuver to perfection - hook customers with lower prices, then allow them to book their flights at these lower prices (the truly diabolical twist)...

After being unable to book a complicated multisite international itinerary online through Kayak/Travelocity/Orbitz, I found Farebuzz, which to my delight allowed me to make the booking online. Then 2 days later they start calling (not emailing) to tell me the cost has changed. In my case, they made the excuse that the airlines on my international multi-city itinerary were charging extra to issue e-tickets - but Farebuzz could not/would not tell me how much each airline was charging.

I suspect that Farebuzz is not the only disreputable site that pulls this fraudulent trick. I will never again use anything but the more reputable, larger travel companies.