I've got a party coming up and the dress theme is Great Gatsby/Roaring 20s

Where could I find the necessary outfits to fit the theme? I seldom go to parties or fashion-themed gatherings so I'd settle for a simple enough look that fits the theme. Sunway Pyramid perhaps?

And how much should I be prepare to fork out? Again, I dont need top tier brands or anything. Heck if I could buy second hand that would be even better!

I'm staying in Subang. Many thanks in advance


Attached thumbnail(s)