Geraint’s advice for a magician who wants to begin to sell illusions depends on what you want to accomplish.  Some people just want to make as much as possible.  But others want to be known and respected for creating quality magic.  Networking with the magic community to create something of value is hugely important.  But, he advises that once you conceive of a trick you should sit on it for a while.  Geraint has created tricks that he perfected over years before bringing to market.