Russia offering 200K vouchers worth $1,677 toward purchase of Russian car
Customers must turn in car 10 years old or older; AvtoVAZ likely to benefit most
More than 10 foreign companies have joint ventures in Russia
Dealers wary because they must pay owners for old vehicles
Then hope to reclaim cash from government; worry over program transparency
Experts say target audience likely to purchase inexpensive vehicles under Cash for Clunkers