Aviation

AeroAlaska - Offering free general aviation, vintage aircraft, parts, employment, businesses, and aircraft wanted classifieds.
http://www.aeroalaska.com

Used Aircraft - Offering free classifieds for used aircraft, parts, military planes, helicopters, warbirds, and business jets.
http://www.usedaircraft.com

Planemart - Free listings for commercial, regional, and corporate aircraft.
http://www.planemart.com/

European portal for used aircraft - Essential-aircraft.com is the European portal for used aircraft in France, Spain, germany, UK, and Italy.
http://www.essential-aircraft.com

Aircraft Classifieds - Offering a fee based aircraft listing portal for private and corporate aircraft.
http://www.sellaviation.com

Aircraft For Sale - Offering advertisements for general aviation aircraft, group flying and clubs. Based in the United Kingdom.
http://www.cfors.co.uk

Wardley Johnson - United Kingdom based site offering free ad placement with pay after sale.
http://www.wardleyjohnson.org.uk/

Aviatorsale - Providing a classified listing for general aviation. Based in Denmark.
http://www.aviatorsale.com/

Global Air - Offering paid and free aircraft classifieds listed by manufacturer.
http://www.global-air.com

List A Plane - Providing free general aircraft classifieds as well as paid commercial classifieds.
http://www.listaplane.com

Skysupermarket - Offering free and paid listings for ultralights, helicopters, gliders, and general aviation aircraft
http://www.skysupermarket.com

Aircraftbrowser.com - Featuring fee based photo classifieds for general aviation.
http://www.aircraftbrowser.com/

Natco Trading Corporation - Fee based classifieds for all types of aircraft. Includes forums, industry links, and dealer information.
http://airplanetrader.com

GreatAircraft.com - Free advertising covering all kinds of aircraft.
http://www.greataircraft.com/

SellMyAircraft.com - Offering members a simple and cost effective method of displaying aircraft or aircraft accessories.
http://www.sellmyaircraft.com

PropWash.com - Featuring many types of aircraft including single and multi engine airplanes, helicopters, and ultralights.
http://www.propwash.com

MyPlane.com - Pay per click classifieds featuring planes, helicopters, gliders, and hot air balloons.
http://www.myplane.com/

GreatVehicles.com: Aircraft - Free photo ads for all types of recreational aircraft.
http://greatvehicles.com/airplanes/

Planequest.com - Offering paid aircraft listings. Located in Cincinnati, Ohio USA.
http://www.planequest.com/

AviaStock.com - Providing free aviation classified ads including parts, avionics, and accessories for sale or wanted.
http://aviastock.com

Aero Photo Classifieds - Offering searchable database of aircrafts, helicopters and jet planes. Also provides listings of autos, boats, motorcycles, and RVs.
http://aerophotoclassifieds.com/

SkyMerchant Aviation Classifieds - Offering free and paid aircraft classifieds and aviation employment positions.
http://www.skymerchant.com

Aircraft Portal - Photo advertisements for private or business customers.
http://www.aircraftportal.com/

Plane World - Offering aviation classifieds and information.
http://www.plane-world.com/

AeroHunter.com - Offering free and paid aircraft classified ads. Provides a forum, loan calculator, and weather.
http://www.aerohunter.com/

Pilot Market - Offering listing of general aviation classifieds as well as business and commercial listings.
http://www.pilotmarket.com/category/Aircraft_For_Sale/

AircraftMarketplace - Specializes in pre-owned aircraft sales, including jet and helicopter sales. Includes a directory of related businesses.
http://acmp.com/

TheHangar.co.uk - Featuring general aviation, ultralight, helicopter, and aircraft parts listings. Based in the United Kingdom.
http://www.thehangar.co.uk

AirplaneMart.com - Providing general aviation listings including experimentals and military aircraft.
http://www.airplanemart.com

Aircraft Bargains - Providing general aviation listings as well as an aviation forum.
http://www.aircraftbargains.com/

Aeroclassifieds - Free classified listings of aircraft for sale. The site focuses on the UK and Europe, but worldwide listings are welcomed.
http://www.aeroclassifieds.co.uk

Buy Planes For Sale - Classified ads for all things aviation including aircraft, airplanes, helicopters, engines, parts and employment.
http://www.buyplanesforsale.com

BuySellAviation.com - Offering free classifieds for airplanes, helicopters, and aircraft parts. Includes an aviation auction.
http://www.buysellaviation.com/

A-Z Ultralight Classifieds - Free classifieds for ultralights and light sport planes. Also offering a list of related links.
http://www.azultralights.com/

TradePlanes.com - Offering free classified ads for the aviation community.
http://www.tradeplanes.com

AircraftDealer.com - A sales directory featuring aircraft for sale from dealers and brokers.
http://www.aircraftdealer.com/

Aero Buy Sell - Providing free and paid listings for general aircraft, jets, and parts.
http://www.aerobuysell.com/

Barnstormers.com - Providing free classified for general aviation including antiques and experimental aircraft. Also provides aviation related employment classifieds.
http://www.barnstormers.com/

HelicopterShopper - Offer listing of helicopters, equipment, parts, avionics, employment, and other related services.
http://www.helicoptershopper.com