ASO is the Leading Source for personal, business jet and transport aircraft for sale by owners and aircraft dealers. Founded in 1996, ASO was the first web-based listing of pre-owned aircraft for sale. Since then, ASO has brought about a fundamental change in the way that aircraft are bought and sold by allowing buyers to easily search up-to-date listings rather than pour through outdated print magazines. Today, ASO is the most comprehensive and up-to-date aircraft listing source with an average of 3,000+ aircraft listed for sale. The site draws on average 164,300 unique visitors per month, generating over 4,000 sales leads.