Which of the following is NOT a restriction for a wholesale dealer?

The correct response highlights the fact that wholesale dealers are primarily engaged in selling vehicles to other licensed dealers rather than directly to the end consumers or the general public. One important characteristic of wholesale dealers is that they typically engage in transactions within a closed network of dealerships.

The role of a wholesale dealer can include various types of vehicles, including recreational vehicles, which means that this type of dealer is not universally restricted from selling such vehicles, making the assertion in the answer that wholesale dealers cannot sell recreational vehicles inaccurate as a restriction.

In contrast, the other options represent standards or practices that are generally upheld in the wholesale vehicle trade. The wholesale dealer's inability to sell to the general public and the limitation to trade only with other dealers reflect the nature of their operations, where the focus is on sales between businesses instead of to individual consumers. Furthermore, the option related to auctions clarifies that wholesale dealers can participate in auction sales, expanding their business activities within the framework of authorized sales channels.