Courtesy Aircraft

Professional Aircraft Brokers



Courtesy Aircraft Sales

We assist aircraft sellers and buyers nationwide.

Professional Aircraft Brokers

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Worldwide available inventory is low and demand is high. Don't delay!

SELL Your Aircraft Here…

Courtesy Aircraft currently has buyers looking to buy select aircraft, both operable and inoperable. Click Here for more information. 

With nearly 70 years of aviation sales experience, Courtesy Aircraft is an aircraft broker that can list and market your aircraft.

Our top priority is to make the sale of your aircraft go smoothly while our team handles the interface with prospective buyers.

Our Experienced Crew

Kathi Spencer, Mark Clark, Darcy Kaapke @ Oshkosh '23

Courtesy Aircraft, Inc. was founded in 1957, by D.M. Clark, as a new Cessna aircraft dealer, and grew through the 60’s to include Piper and Champion (Citabria) dealerships. In addition, Courtesy Aircraft, Inc. was active in the sales of select used aircraft. It was in the success of the used aircraft market that pointed the way to the firm’s current position as a world leader in quality warbird and civilian aircraft sales. In the early 70’s, due to the knowledge and enthusiasm of the founder’s son, Mark Clark, today an accomplished pilot and A&P mechanic, Courtesy Aircraft, Inc. found itself heavily involved in sales of a new market – Warbirds. 

This market consisted primarily of World War II and Korean era ex-military trainers, fighters, and bombers such as the T-6/SNJ Texans, P-51 Mustangs, and B-25 Mitchells.

In the early 80’s, Mark purchased the company from his father and relocated to a 13,000 square foot facility conveniently located at the Greater Rockford Airport in Rockford, Illinois. The business continued to prosper and another new market began to emerge.

In 2009, Darcy Kaapke joined the company as Marketing Director and Aircraft Saleswomen focusing on Beech T-34 Aircraft, Stearmans, BirdDogs and a variety of Civilian General Aviation aircraft. Kathi Spencer, Courtesy’s Office Manager, has been with the company for over 20 years. She focuses on keeping the office running, day-to-day accounting, aircraft lien research and orders, and filing all FAA documentation for aircraft sold. 

Benefits of Listing with Courtesy Aircraft


Led by company owner, Mark Clark, the industry's GO-TO Highflier who got his pilot's license before his driver's license, we'll answer all technical aircraft questions.


Our marketing director and aircraft saleswoman,Darcy Kaapke, is a licensed pilot with a degree in aviation. Darcy has sold over 125 planes.


We have daily involvement in the aircraft market so we can better advise both buyers and sellers on market forces.


We qualify the customer for the aircraft by considering their level of pilot experience & price range.


Our team can handle the legwork of coordinating aircraft showings for qualified buyers.


We feature our customer aircraft on Trade-A-Plane and Propeller, as well as broadcast to our customer email lists with thousands of interested prospects.


Offload the stress of explaining aircraft maintenance to a buyer. We will help them learn how to take good care of their airplane.


Our team will do the research and file all appropriate paperwork with the FAA.

Are you considering listing your own aircraft without the help of a professional?

If so, be sure to read this article.

Aircraft Wanted

We have serious buyers on standby ready to engage...

Hot News

Courtesy Aircraft on SocialFlight Live

Courtesy Aircraft President Mark Clark makes a guest appearance on SocialFlight Live.  ...

Featured in Air Classics December 2022 Issue

Read “What Warbirds Mean to Me” by Courtesy Aircraft President Mark Clark.  ...

Press Releases

Prestigious Aircraft Collection Now Available Through Courtesy Aircraft Sales

Rockford, IL -- Courtesy Aircraft Sales has been commissioned to sell over 20 rare, vintage and one-of-a-kind warbird and civilian ...

Airport Business Magazine

See Article about Courtesy Aircraft in Airport Business Magazine ...

Upcoming Events

22 Jul

EAA AirVenture

July 22, 2024 - July 28, 2024    
7:00 am - 8:00 pm
July 22-28, 2024. EAA AirVenture's daily air shows feature a vast variety in today's world of flight — precision aerobatics, the latest innovations, rare and [...]
09 Apr


April 9, 2024 - April 14, 2024    
8:00 am - 8:00 pm
April 9-14, 2024. Saleswoman Darcy Kaapke is getting ready to see Courtesy Aircraft's customers and airshow family at the SUN 'n FUN Aerospace Expo! She [...]

Customer Admiration

Countdown to EAA's AirVenture in Oshkosh, WI! We look forward to seeing you there in the Warbird Area!