If you have ever traded online, you have probably used ebay as a platform for your trades.
I suggest you consider these alternative platforms that could be cheaper than ebay depending on your trades:
cqout.com - works similar to ebay but simpler and a lot cheaper
folksy.com - if you are into crafting and unique gifts
tinypayme.com - great platform if you want to sell through your twitter, facebook, blog.
No account needed, listing is free, just take a picture, write a description and give a price and you in business all under 5 minutes.
preloved.com - more like a second hand shop with both free and paid membership, free to sell.
Amazon is another great site to sell and good alternative to ebay................
Have a profitable trade and enjoy the new experience