I suggest you read this article - and pay special attention to the last sentence.
http://debrady.com/technical/articles.htm#amatuerorpro
If you want to make money selling your work, you must first stop buying your glass retail. Wholesale is about half the cost of retail. Second, you must concentrate your efforts as much on efficiency as aesthetics. The time it takes to make a piece can ALWAYS be reduced to 25% or less of that original time - IF you work effectively and efficiently. It's the ability (talent?) to work quickly that determines your income.
With a little practice, anybody can make a good looking bead. The greater skill comes in making a good looking bead quickly enough to sell it at a price customers accept.