Third-worst flop of the decade: Lexus LS 600h L
Sales:
2,055 (2007-present)

Takahashi calls the $120,000 LS 600h L "a six-figure hybrid that doesn't really get great gas mileage."

The LS 600h rates only 19 miles per gallon in city driving -- just 3 mpg better than you'd get with its non-hybrid cousin the Lexus LS 460, which costs almost $50,000 less.

In fact, the LS 600h gets worse highway mileage than the LS 460: 23 mpg for the hybrid vs. 24 mpg for the gas-only model.

"The only reason I see for Lexus parent Toyota ( TM) putting the LS 600h out is for luxury buyers who want to say: 'I've got a hybrid,'" Takahashi says. "But it's not even a particularly good hybrid."

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