RealtyBid.com, online home auction company, discounted its standard listing fee from $150 to $25 through the end of December. Real estate agents looking to market property listings through an online auction can take advantage of the offer. If the property sells, RealtyBid.com will cut its sales fee, or the buyer’s fee, from 1% to a flat fee of $500. According the release, a promotional code is available to interested agents. RealtyBid.com’s executive vice president Mike Keracher said that real estate professionals are beginning to understand the auction marketing value. “As the acceptance of real estate auctions has continued to grow and the use of the Internet has become integral to our lives, more and more real estate professionals have added Internet auction marketing to their arsenal of tools,” Keracher said. Write to Jon Prior.