617 Aircraft, 21 for Sale: Inside the G550 Market

I went looking for a late-model G550 for a client.

Here is what the market actually had.

Per JETNET, there are 617 G550s in operation. Twenty-one are for sale. That is 3.4% of the fleet.

Across business aviation as a whole, about 6.6% of aircraft are listed. Nine to ten percent is what usually makes a buyer’s market.

So the G550 is sitting at roughly half the market-wide rate.

Then I narrowed to 2015 and newer. That is 128 airframes. Two were on the market, and one of those was in for maintenance.

One airplane.

Supply Cannot Grow

The number nobody looks at is production. It is zero. Gulfstream Aerospace ended commercial production and delivered its final commercial G550 on June 30, 2021, wrapping up an 18-year manufacturing run that began in 2003.

The Spread Is the Real Story

JETNET puts absorption at 3.9 months. If nothing new were listed, current inventory clears in under four months.

But look at days on market. The low is 2 days. The high is 994. The average is 106.

One aircraft sold in two days. Another has been listed for almost three years.

That is not a tight market. That is a bifurcated one.

The right airplane, priced right, is gone in days. The wrong one sits for years at a number nobody will pay.

There is no average G550 for sale. The average is useless to a buyer.

Why 596 Owners Are Not Selling

The number I keep coming back to is 596.

That is how many owners are not in the market to sell.

At the JIQ fireside chat last month, Richard Koe showed owner-flown Part 91 activity up just 0.6% this year. Fractional was up 9.9%. Charter was up 4.3%.

Most people read flat Part 91 as ownership losing ground.

I read it differently.

A corporate flight department is not a revenue asset. It is executive logistics. The aircraft exists so a few people can be somewhere on short notice.

That requirement does not care what the airplane is worth.

An owner running a G550 on Part 91 is not holding an underperforming asset. They are holding a capability. There is no price that makes the logistics problem go away.

Which usually means there is no price that triggers a sale.

What This Means If You Are Buying

Know what you actually need before you commit to a spec. Every requirement you add cuts into a pool that starts at 21 worldwide.

Be ready to move. A two-day low on days-on-market means the good ones are gone before a slow buyer finishes thinking.

Read the long listings correctly. An airplane at 994 days is not a bargain waiting to happen. It is a pricing, records or specification problem, and it becomes your problem on resale.

Work off-market. Twenty of the 21 listings are on exclusive. The published inventory is not the real market. The real market is a conversation with an owner who was not planning to sell.

Final Approach

Transactions across business aviation were down in the first half of this year. That is the headline.

It is not what a buyer experiences.

If you want this specific airplane, you are not in a soft market. You are in a market with one airplane for you in it, if you're lucky.

Twenty-one for sale. Seventeen in the United States. One that fit the requirement.

That is the market.

Joseph Pennella
Penn Jets LLC

Figures from JETNET’s G550 market summary, retrieved 16 October 2026. Part 91, fractional and charter activity from JETNET and WINGX data presented at the JIQ fireside chat, 30 September 2026. The 2015-and-newer count reflects Penn Jets research at the time of that search.

Market commentary only. Not tax, legal or investment advice.