Most people don't expect receipts at street fairs but if you are keeping track of your sales for tax purposes, then it makes sense to get those 2 part receipt books (available at staples, wal-mart, etc.). Also, I highly recommend getting a square credit card reader if you have a smart phone. I got one and used it at the Antique Faire we had in March and it was great! It resulted in hundreds more dollars of sales for me. I put up a sign that said "Save your cash! We take all credit cards!" and they saw the sign and bought things they wouldn't have...You can read about it at www.squareup.com.