Price discrimination
bokonist: is there any other benefits of "no price tag" approach, particularly for buyers?Yes.  Say the marginal cost of a good is $1000.  The fixed cost of developing the product was $900,000.  There are 100 potential customers.  In order to break even, the average sales price must be $10,000.  But let's say that some customers can afford to pay $50,000, while most others can only pay $5,000.  Without price discrimination, the product simply would not exist.  If you charged $10,000 to everyone, the smaller companies simply could not buy.  But if you price discriminate, and charge the small companies $5,000 and the big companies $50,000 you can cover your fixed costs and break even.  Everyone wins.  The producer makes money and both the small customers and big customers get a product that otherwise would not exist.