Oh...I agree $4. is not enough. I have a small candle business and have done a lot of craft shows. I usually check out a lot of the other booths...and sometimes buy. I bought one of those "in style" knitted scarves and I paid $20. for it. You HAVE to pay yourself for your time.
I think $10. is a good price.
In figuring my candle price I charge $1.00 per ounce. And if the jar I use is more expensive than a jelly jar then it is price higher. And my candles sell...and no one blinks an eye. lol