# Is dual pricing, arbitrage?

It was written in the current opener of Arbitrage in Wikipedia:

In economics and finance, arbitrage is the practice of taking advantage of a difference in prices in two or more markets;

To me, dual pricing can be a private case of that, although in dual pricing the price is something created anew by the price maker (so there is no "taking advantage of a difference in (existing) prices").

In situations where the goods/assets are tradeable without any friction, and good A is sold to somewhere/someone at price $$P_A$$ while good B is sold to someone at price $$p_B$$ people may be able to take advantage of this and buy only at the lower price.