If you’re wondering when we’ll finally have an all-electric car that’s both affordable and dependable, Nissan may have the answer. The all-electric, five-passenger Leaf sedan goes on sale in December in select markets, with nationwide availability starting in 2011. The Leaf is highway-capable, as it can top 70 mph, and its range (about 100 miles) more than covers average commutes. But what really sets the Leaf apart from other electric cars is its price. Starting at about $33,000, the Leaf’s price tag can fall to as low as about $25,000 after tax incentives. Actually driving the Leaf will cost significantly less than a comparable gas car. Recharging the Leaf can cost less than $3 per “fill up.” Sound promising?