The con can be pretty expensive, last year the Luna figure i wanted was $80, way above my price range!
This year i will be back as a vendor. Along with my GF (FizzyFilly) We will be selling MLP Themed Bath Bombs and Bubble bars. We will have a lot of great deal and most items will be between $3-6. We may have some $1-2 items so if people want there money to stretch you can find great deals for small items.
I personally like the buttons that some of the artist sell, those can be pretty affordable.