Depends on your driving as well. The fuel economy difference in city driving might be greater than 3L/100km too.
If you do 15000km a year and gas is $1.20 a litre, a 3L/100km difference means $540 less is spent on fuel a year, but you're forgoing maybe $2-300 in investment returns per year on the additional $3000 spent. Still in front, and if you keep it long term it'll be a better bet financially, especially if the price of fuel increases or you're doing a lot of k's a year.
I see a lot of Camry hybrids used as taxis here, so presumably the running costs make the extra cost of the hybrid well worth it.
Up to you and your values obviously. It might be marginally cheaper to buy the non hybrid, but if you value the reduced environmental impact, the hybrid might be worth any extra to you.
Personally I'd probably get the hybrid anyway :)
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