just wait until the new electric cars with double the range come to market then the price on these 60-70mile range cars will really really plummet.
I'm basing this on what happened in the electric motorcycle industry which is a few years ahead of electric cars. New Zero Motorcycle with 35 miles range used to sell for $10,000 now you can get them under $2,000, 80% drop in value over just 4-5 years. And most of them are very very low millage.