If you do not receive compensation for conducting the sale, you are not required to be licensed as an auctioneer.
Yes.
If you personally own the goods and you did not acquire them for the purpose of reselling them, you are not required to obtain an auctioneer license.
A licensed auctioneer can call bids for cars and other motor vehicles. The paperwork for releasing the title to the vehicle must be completed by someone with a dealer's license.
See Chapter 3: Additional Information, Rulings, Procedures, and Industry Circulars, ATF Rul. 96-2, Engaging in the Business of Dealing in Firearms (Auctioneers) in the Federal Firearms Regulations Reference Guide.
A licensed autioneer can call bids for real estate. However, you or an associate must be licensed to perform the activities regulated under Washington Real Estate Licensing Law, including earnest money, contracts, and marketing.