Websites to Sell Stamps

I bought a lot of 1000 stamps recently and found many duplicates in it. I would like to sell some of my stamps but I am unsure where to list them. I know that plenty of collectors sell their stuff through eBay but since I am located at the other end of the world, the shipping fee to the buyers will likely be very high. I would like to search for alternatives to eBay (hopefully one that focuses on stamps). Apart from StampWorld which seems a tad sketchy, what are some websites I could sell my stamps on?