Hi sonal3468,
The sites with free listings currently are India, China and Taiwan.
However, for the purpose of export, markets like US, UK, Australia and Germany are better options. These sites often have promotions such as 10 cent listing day. You can wait for such promotions and list on these sites on these days. This will reduce your cost, while giving you some experience of international markets.
Alternatively, you can create a marketing budget for yourself, and use it to list / promote your products on internatioanl sites. This will again help you keep your costs under control, while experienceing internatioanl markets. Also, if you are selling internationally, please do a good search on completed listings (option is in Advanced search) to get a good idea of what sells in that market. This will help you list saleable products.
Warm Regards,
Tanya Goel