Just found out this on-line shopping site from Hong Kong.
http://www.hobbyeasy.com/Home.do?status=yes
It has justed started business less than a week ago. Don't know about if they are reliable. BUT, hey, for a newest Tamiya's Challenger Mk 2, Leopard 2A6 and M1A2, the price is HK$210, $199 and $180 which is US$27 and US$25 and US$23 respectively(rate of US$ to HK$ is 1:7.8). Boy, can you believe it? Of course if they are reliable company, even shipping fee is added, it's still cheap.