So far I do not sell them. Most of the ones that I have made have gone out the door as testers and gifts. If you are trying to figure out a way to make extra money, this really isn't the way to do it. I have been making candles for 5 years and am only now thinking of selling. Until I can afford the necessary things like insurance, though, that is still just a thought. To figure out how much wax a candle mold needs, there are instructions on this board. I think its under general information, or techniques and ideas. Either way, there is alot of help here. Just remember, it isn't about heating up wax, sticking a wick into it and selling it. You have to test them from top to bottom and make sure you are sure you can replicate them. I have found that my 3X3 pillar weighs about 1 pound finished. HTH Pat