About SIMA Auctions SIMA Auctions is one of the fastest growing Real Estate Auction Companies in the United States. With its unique team of Real Estate selling professionals, SIMA provides unmatched Real Estate sales and service to people wanting to sell their real property using the Auction method of marketing. The Auction method of marketing establishes the sales price through competitive bidding. As experts in marketing Real Estate, SIMA can help you sell your residential, commercial, industrial or agricultural property. You can depend on SIMA to sell your property with no contingencies, close your property sale in thirty days or less, and save you time and money when selling your property. In addition, when you use SIMA to market and sell your home, you, the seller, do not pay a sales commission.