About The Prebuy Guys


"Once you've tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return" -Leonardo da Vinci


Who we are

Don Sebastian is a pilot, flight instructor, aircraft mechanic and aviation expert with over 50 years' experience helping aircraft buyers and owners. Don is rated in airplanes, helicopters, and gliders and is type-rated in several jet aircraft including the Cessna Citation corporate jet. Learn more about Don here.

Adam Sipe is an aircraft mechanic, pilot and aviation management expert with over 10 years' experience maintaining and managing aircraft. Adam served as a crew chief, mechanic and quality assurance inspector on the F/A-18 Hornet fighter jets while serving in the Marine Corps. Learn more about Adam here.


What We do

Aircraft prebuy inspections made easy. We are The Prebuy Guys, an independent aircraft pre-purchase inspection and prebuy service. We've been representing aircraft buyers and owners for over 50 years by delivering independent and comprehensive aircraft pre-purchase inspection services and aircraft ownership consulting. We are experienced on every make and model aircraft and have the experience, expertise and resources to make the buying process simple, straight forward and stress-free. We've helped thousands of owners over the years make smarter, more effective buying decisions, and we can help you too. Click Here to learn more.


Aircraft ownership made easy. Aside from helping prospective aircraft buyers with their prebuy inspection needs, we also assist in researching, finding and selecting candidate aircraft to buy. Once you buy the aircraft, we continue to provide you with support through a variety of aircraft ownership, maintenance, operations and management coaching programs. Click Here to learn more. 


Our Mission

To enhance aviation through responsible and effective aircraft ownership - helping you save money, reduce risk, and increase safety with your personal or corporate aircraft. 

Our ethos

To have a passionate and disciplined commitment to excellence.

Our Vision

Our vision is to make aircraft ownership simple, more affordable, and ultimately more accessible by becoming the most trusted resource for aircraft ownership, maintenance, and operations.



Why Choose the prebuy guys for your next aircraft?

We understand that purchasing an aircraft is a major investment for you or your business. We also understand that navigating the complexities of aircraft ownership can be confusing and time-consuming, which is why we’re here to guide and support you during each phase of the purchase process and beyond. We have more than 60 years’ combined experience flying, maintaining, and managing all types of airplanes, including piston, turboprop, and jet-powered aircraft. We put our years of experience to good use by helping  you save money, reduce risk and increase safety.

We are not “armchair” consultants; we are hands-on aircraft mechanics and pilots that work in the field. Unlike maintenance shops, we specialize in pre-purchase evaluations and aircraft ownership matters. Thus, we have the experience, tools, and resources necessary to provide you with comprehensive, unbiased evaluations and advice for your aircraft. Moreover, we represent you and your interests during the entire process, and provide a wide variety of flexible options to meet your needs and fit your budget.

Finally, we are committed to providing you with the personal service and support you deserve as an aviator. Thus, you’ll always have direct access to us by phone, email, and video-conferencing platforms. We’re focused on quality over quantity, so you’ll always get the information you need to make more informed decisions with your airplane.

Want to learn more about us? Listen to our free weekly aviation podcast about aircraft ownership called the Airplane Intel Podcast, available here and on all major podcast players.