exile, you might want to try out the exhibitions like Divalicious or Shimmer.... look them up on facebook. I know Divalicious is having a 2-day exhibition in December. There are few others as well - join up the above facebook pages and you'll probably come up with more information on other exhibitions.
You could also check out the school fairs - but I don't know if they're the sort of places you'd want to sell - maybe you can try visiting them and see if they're the market you're looking for.
depends on your goods.
If you've made them, try ARTE market that's held on Fridays at Festival City and Times Square.
Otherwise, if it's your second hand goods try the Flea markets at Safa Park and Uptown Mirdiff.
Alternatively try Souq.com or Dubizzle.com
Fee
If I wanted to start selling goods at markets - first of all what markets are there and secondly do I need some type of licence? what is the cost involved?