Antiques and Collectibles
Advertising Collectibles, Autographs, Stamps, Toys, Trading Cards, A to Z Bid, Antique Auction Center, Antique-Photography.com, Arrowheads, AuctionHome, Aumann Auctions, Inc., Ball and Boyd, BestCollectors.com, Biddington's, Bob Courtney Auctions
Arts and Crafts
Art By Us, Artelino - the magic of art, Bid4IndianArt.com, Captive Imagery Unique Art, E-Arts-And-Crafts, eBay: Art, G.B. Tate and Sons, Guyla.com, Kotobuki, Little Saint Nick
Auction Houses
A Touch Of Class Auctions, A.N. Abell Auction Co, Ace Auction Co., Alaska Auction Co., Ann & Co. Auctions, Auction Bill, Ball Auction Service, Boediger, Bonhams, Bonhams & Butterfields
Autos
Barrett-Jackson Auction Company, Branson Collector Cars Auction, CalCruising, Collectors Car Auction, Copart Auto Auctions, Inc., Ebaymotors, Leake Auto Auction, Motors Auction Group, Racer's Auction, SalvageNow
Charity
Auctionair, Generous Adventures Travel Auctions, GoBid, Kingston Auction Company, ShopGoodwill.com, Wild, Wild eAuction
Computers
AberBid, C/Net Clearance Center, CompUSA Auctions, Computer Care Auctions, Dell Computer Auction, Digital Auction, Earthweb Direct, FairAuction, Morgan Auction, The Auction Depot Computer Sales
Food and Wine
AuctionVine, Brentwood Wine Company, CellarExchange.com, Hospices de Beaune Wine Auction, MagnumWines, Rare French Wines, The Chicago Wine Company, The Wine Commune, Uvine, WhiskyAuction.Com
Search Engines
AuctionGuide.com, AuctionIowa.Com, AuctionZip, Autcions-Portal.com, Bargain One, Bid XS, BidFind, eBay Stores, Finds-It, GoHook
Specialty
Aircraft Slides, Amethsyt Auctions, AquaBid, AstroAuction, Clothesbid, Dance Auction, E-Slotauction, Ehunt.ca Outdoors, Equestrian Auctions, FaithBid
Sports
Cards, Baseball Planet Sportscards, Bid4Sport, UK, Coubertin Olympic Auction, eBay: Sports, Fandamonia, Golf Auction, Golf Buggy Auctions, Golf Club Exchange, Golfbidder, Que Bid
Amazon.com Auctions
Organized by category with search available. Also lists some items for Sotheby's.
Auction & Barter
Books, clothing, beauty, collectibles, home and garden.
Auction Fire
Offers a variety of categories. Includes image hosting, consignment service, message board and fraud alerts.
Auction-Warehouse
Name-brand computers, peripherals, games, and electronics.
Bayoubid
Includes antiques, arts, books, music, jewelry, real estate and collectibles.
Bid-Alot.com
Offering listings for a wide variety of products. Includes information regarding photo uploads and registration.
Bidville Auctions
Offering a wide variety of products, includes a watchlist and image gallery.
Christian-Auctions.com
Includes bibles, books, music, computers, and collectibles.
CQout
Wide variety of products including arts, books, fashion, housewears and jewelry.
eBay
International person to person auction site, with products sorted into categories.
General Services Administration Auctions
U.S. government offers the general public the opportunity to bid electronically on a wide array of federal assets. Surplus, seized and forfeited assets are available for bidding.
iOffer.com
Offers electonics, crafts, business, hobbies, home and garden, video games and computers.
KaBid.com
Products offered include books, coins, stamps, trading cards, sporting goods, toys, and music.
QXL
Online auction with offers for European consumers, including arts, collectibles, cars, computing, consumer electronics and entertainment.
Sam's Club
Includes apparel, electronics, computers and software, jewelry, and toys.
Steal it Back
Police auction selling seized, repossessed, and confiscated items on online auction.
The Free Auction
Offering a wide variety of categories. Includes live chat and message board.
Utrove.com
Computers, automotive, housewares, music and electronics. Includes a gallery and account information.
Vintage Auctions of Canada Ltd.
Online auctions for collector cars, art, and other items.