But compared to the cost of manufacturing a modern automobile there's no particular reason an electric car should cost more if the numbers of cars manufactured were equal.
Well, if you actually look into the engineering involved, along with the rare earth materials needed to manufacture, there are fundamental setbacks for the proliferation of electric vehicles on a wide basis. Copper is expensive, so is Lithium, So is Cobalt, and of course the Gold needed for connectors. Hydrogen fuel cell vehicles need Platinum, Rhodium, and Palladium for their fuel cell reactors, so that's not a viable alternative either. Electric vehicles are typically made with advanced lightweight materials like composites like carbon fiber or at least unibodies made from aluminum to offset the battery weight, which are more costly to manufacture and repair (if you can find somebody qualified to do the repair). Rare earth elements in electric cars are mainly mined from the war-torn third world or Lithium mainly from China, and lightweight composite materials are very expensive due to their use mainly by the military in advanced aircraft, not to mention the specialized manufacturing techniques required to make finished products from them.
20 years ago I thought that the future would be a time of abundance and high technology applied to solving the world's fundamental problems and make cars more advanced while still being affordable. The reality is that economic and political turmoil, along with perpetual warfare, have created a false state of scarcity and have shifted the focus of the engineering community away from solving the fundamental problems facing society, and toward products tat are profitable, like cellphones and weaponry.
Until the world exits the current dark age and uses their knowledge and technology to bring these wonderful things to the public at a price affordable to the common man, the electrics will remain something reserved for short range commuters or the advanced ones like Tesla Model S's for the out of touch elite whom are looking to improve their image and coddle their heavily weighted consciences.
As for batteries out of a junked electric car, you could luck out and find a totalled Tesla maybe and separate out the prism cells and build a BMS, but the chances of it all being obtainable for a decent price and then working are a lot less than just buying brand new prism cells like A123's and having a spec sheet and support for building a system that works perfectly, which it has to or it won't last long.
Two strokes with a catalytic converter or a muffler packed with highly catalytic 316L pot scrubbers smell cleaner than any four stroke motorcycle I've had the displeasure of driving behind, Harleys being some of the worst smelling beasts ever. If you run pure castor oil as your premix at the expense of gunked cylinders and heads, the emissions are reduced even further, or you can choose to run a low concentration synthetic premix like Opti2 at 100:1 and avoid the gunk. The minimal emissions impact that two stroke bikes have on the environment versus diesel trucks and trains, and unregulated aircraft emissions, are negligible, and California lawmakers know that and therefore promote the use of small scooters and mopeds as an alternative form of transportation.