/cgl/ - Cosplay & EGL

I'm so excited Seagulls, I got a booth for a con in September! It'll be my first trip to a con for selling.

How well do plain stickers do? I mean stickers without extra colors, holographic stuff, etc.
I've been designing some stickers to go along with my brand, but they're fairly plain. Do you think I could actually sell them for $1 for a sticker or two?
I was also thinking of one of those "If you like us on Facebook on your smartphone, you get a sticker!" things.
(to clarify, my booth will be primarily plushies and accessories, the stickers would be a side thing).
Also, in general, how well do your 'extras' do? Stuff that's related to your table, but isn't your main thing?