Alpha Beta Unlimited: Sales of singles, packs, boxes, and sleeves. All editions available.
Blackhawk Games: Site sells virtual singles for use in the Magic online game.
CardSorcery.com: US based card dealer selling singles from Alpha to the latest sets, along with boxes and boosters.
Cargaill's Magic: the Gathering Cards: Individual selling his excess cards. Mostly uncommons, but also stocks rares.
CCG-Warehouse: Offering singles as well as sets.
Chargalley.com: Magic: Offering single cards, packs, decks, supplies, and booster boxes.
Collectandplay.com: Specializing in Magic The Gathering card singles.
Cutting Edge Cards: UK Magic the Gathering, Harry Potter and Pokemon singles, booster and box sales. Site also features an articles section, links, and downloads.
Forstle Card Shop: Magic singles for sale. Payment by Paypal.
Gator Games: Magic singles for sale.
Grand Slam Sports Cards: Magic the Gathering cards and other ccg cards sold by the box.
J.D. Trading Company: An internet storefront specializing in singles.
KardKastle: US based dealer. Selling boxes, booster packs, sets, singles and sleeves. Also buys cards.
Lazarus' Magic: The Gathering Auction: An automated auction site.
Magic: Offers Magic products for sale including boosters, starters, pre-constructed decks, sets, and singles ranging as far back as Arabian Nights. Texas, USA.
Magic Card Sales: Individual selling a small selection of Classic Edition single cards.
Magic Card Singles: Features single cards and online virtual cards.
Magic Greats: Sells pre-made decks, repackaged random cards, and individual cards.
Magic Shack: An assortment of cards with shipping offered worldwide. Accepting all major credit cards as well as PayPal.
Magic the Gathering Cards For Sale: Individual selling his 4th Edition to Prophecy cards.
Monolith Lair: Individual selling a few rare cards. Site also has a trading board.
MTGFanatic.com: Offers purchasing as well as selling Magic the Gathing cards.
MTGSale.com: Source for singles, boxes and accessories.
Omega Cards: Individuals selling cards from most sets.
OshkoshMagic.com: Cards and accessories including singles, common card lots, mystery packs, and dice.
Smedlock.com: Offers a complete line of Magic the Gathering items for sale including singles, bulk lots, accessories and other related items.
The Wagical Place: Specializes in singles for all in-print editions introduced after Fallen Empires.
TheEndGames.com: Sells MTG cards from alpha to invasion expansion sets. Includes a message board, deck lists, and a price list.
Wizards Cupboard: Older Magic the Gathering cards for sale.