  In today's economy, selling a new zero-marginal cost product is a real
challenge, as it is difficult to determine a product's "correct" sales price
based on its profit and dissemination. As an example, think of the price of a
new app or video game. New sales mechanisms for selling this type of product
need to be designed, in particular ones that consider consumer preferences and
reality. Current auction mechanisms establish a time deadline for the auction
to take place. This deadline is set to increase the number of bidders and thus
the final offering price. Consumers want to obtain the product as quickly as
possible from the moment they become interested in it, and this time does not
always coincide with the seller's deadline. Naturally, consumers also want to
pay a price they consider "fair". Here we introduce an auction model where
buyers continuously place bids and the challenge is to decide quickly whether
or not to accept them. The model does not include a deadline for placing bids,
and exhibits self-organized criticality; it presents a critical price from
which a bid is accepted with probability one, and avalanches of sales above
this value are observed. This model is of particular interest for startup
companies interested in profit as well as making the product known on the
market.
