Bonham Auction & Appraisal, DBA Bonham Auction Gallery on eBay, is a licensed Indiana auction house owned by Mark & Carol Bonham. Their auction gallery, located on the northeast side of Indianapolis, is open to the public and holds regular auctions every week. Items posted on eBay are the property of their consignors.

Live eBay Auctions are held for important estates or collections. Over the past few years they have hosted Live Auctions for dolls, coins, art, and books, as well as antiques and collectibles.

Bonham's holds membership in the National Auctioneers Association, the Indiana Auctioneers Association, and the National Federation of Independant Businesses. Each of these groups has a Code of Ethics to which they subscribe.

Carol Bonham holds membership in the International Society of Appraisers and the NAA designation of Certified Estate Specialist. She runs the daily operations of the auction assisted by Melanie Jones.