It will be difficult to earn money with something as the Goren microscope and at the same time one would all the time have the risk that one of the components is no longer available. But sometimes the economical settings are different. Someone develops it for himself and his employer or institute. Production may be carried out in a university workshop where the pricing is arranged between academic colleagues. Shipping is done by people who are there anyway...
When they would spend more energy on marketing they could probably sell quite a few. But then again they would create a new economic setting, quality assurance, customer service and so on.
I like it anyway!