What did you buy a long time ago that you have yet to use? I bought a watering can, the spout is

[Chan790]

12. That's usually how street-fairs go.

Trying to make money on them is not really the best approach. If you break even, you're ahead of the game. The better approach is to use it as a show-space. The goal should be to show off your best work and hand out business cards with your contact information and the web-address of your Etsy page. (Have an Etsy page first-of-all, it's changed the dynamics and finances of your industry.) You can get such business cards from VistaPrint for the cost of shipping...around $8.

Beyond that, if you only made $30 and I assume you sold more than 2-3 pieces, you're probably selling too low. Most people adjust up their prices a dollar or two to cover increased overhead. Also, I assume that you do custom work...this again is a reason to focus on promotion at the street fair. Would you rather sell one piece for $10 at the fair or get contracted later by someone who liked your work to design to match someone's dress, supplying earrings and a third piece (bracelet, necklace or brooch) for $80?

(This is my free good-deed marketing advice for the week.)