Lithium battery prices have fallen like a rock but there are still no inexpensive methods for Battery management on the market that actually work. Also the price is still high but not as high. $20k down to about $4-5K for me if I were to convert my c-car
http://www.diyelectriccar.com/forums...-35-26535.html
(this isn't the 1st to go under $0.50 a wthr)