Hi,
I have already made a scrapper which can grab product details from alibaba GOLD members and images for those products, these were to be inserted to phpPROBid database.
I can easily convert the crawler to grab details of all type of members without product details and images.
As I have already worked on it, I can tell you clearly that, There are around 1.5 million companies listed on alibaba.
It will take us around 20 days to get you all the listing and it will be around 5 to 8 GB database.
Let me know what do you think.
Truely Yours
Sameer